C Data Tables for Chapter 4

Category Prevalence for Each Topic

Aesthetics

Table C.1: Three measures of the prevalence of aesthetics in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	1	0.4	0.9%
1877	0	0.7	1.7%
1878	2	1.8	4.5%
1879	0	0.7	1.9%
1880	1	0.8	2.5%
1881	1	0.8	2.6%
1882	0	0.2	0.7%
1883	0	0.1	0.3%
1884	0	0.6	2.1%
1885	0	0.2	1.0%
1886	0	0.1	0.3%
1887	0	0.5	1.6%
1888	0	0.2	0.4%
1889	0	0.2	0.6%
1890	3	1.8	3.9%
1891	2	1.3	4.3%
1892	2	2.0	3.3%
1893	1	1.7	2.6%
1894	0	1.3	1.8%
1895	2	1.7	2.4%
1896	1	0.9	1.4%
1897	1	0.9	1.6%
1898	0	0.3	0.5%
1899	1	0.8	1.9%
1900	1	1.0	2.1%
1901	4	2.1	3.6%
1902	0	0.4	0.8%
1903	2	1.1	2.1%
1904	1	0.6	1.0%
1905	1	1.0	1.5%
1906	0	0.5	0.8%
1907	0	0.2	0.4%
1908	0	0.5	0.8%
1909	1	0.7	1.3%
1910	2	1.3	2.2%
1911	0	0.3	0.5%
1912	1	1.0	1.5%
1913	0	0.4	0.6%
1914	1	0.5	0.8%
1915	1	0.8	1.2%
1916	0	0.3	0.4%
1917	0	0.3	0.5%
1918	1	1.1	1.5%
1919	0	1.1	1.6%
1920	4	2.4	3.6%
1921	3	2.2	2.0%
1922	5	3.9	2.8%
1923	6	3.8	2.8%
1924	2	2.2	1.9%
1925	6	3.6	3.0%
1926	8	4.7	3.8%
1927	1	1.2	0.9%
1928	8	5.5	4.1%
1929	6	3.8	3.2%
1930	3	2.3	2.2%
1931	3	3.4	3.3%
1932	2	1.4	1.1%
1933	7	3.9	3.4%
1934	4	3.1	1.6%
1935	10	6.6	4.0%
1936	4	3.5	1.9%
1937	3	3.0	1.8%
1938	8	7.3	3.7%
1939	6	4.1	2.0%
1940	9	6.9	3.3%
1941	9	7.0	3.3%
1942	8	6.8	3.2%
1943	10	7.0	3.4%
1944	13	8.4	4.5%
1945	3	3.9	2.0%
1946	6	4.7	2.1%
1947	6	5.5	2.4%
1948	11	8.2	3.2%
1949	8	7.0	2.6%
1950	7	6.6	2.4%
1951	6	6.6	2.1%
1952	14	11.0	3.5%
1953	10	8.2	2.5%
1954	7	5.8	1.7%
1955	13	11.3	3.2%
1956	7	7.1	2.0%
1957	9	9.8	2.8%
1958	20	12.8	3.5%
1959	14	11.0	3.0%
1960	10	9.0	2.6%
1961	21	14.1	3.7%
1962	12	10.8	2.9%
1963	5	8.3	2.2%
1964	7	8.8	2.3%
1965	9	8.4	2.1%
1966	4	5.9	1.6%
1967	10	9.8	2.4%
1968	9	10.1	2.5%
1969	10	9.6	2.2%
1970	12	10.7	2.5%
1971	8	9.2	2.0%
1972	14	12.3	2.7%
1973	15	11.4	2.6%
1974	6	7.8	1.9%
1975	10	8.8	2.2%
1976	5	6.6	1.7%
1977	4	4.5	1.2%
1978	15	9.0	2.3%
1979	7	7.3	1.9%
1980	4	6.0	1.6%
1981	7	6.0	1.6%
1982	6	5.8	1.5%
1983	11	8.0	2.0%
1984	5	6.3	1.6%
1985	9	7.2	1.7%
1986	6	6.0	1.5%
1987	5	6.7	1.7%
1988	6	6.1	1.6%
1989	5	5.7	1.5%
1990	1	4.1	1.1%
1991	7	6.4	1.7%
1992	0	2.4	0.7%
1993	4	5.6	1.5%
1994	2	3.3	0.9%
1995	5	4.6	1.3%
1996	3	4.5	1.2%
1997	5	6.3	1.6%
1998	0	2.2	0.7%
1999	2	4.0	1.0%
2000	5	5.4	1.2%
2001	5	4.6	1.2%
2002	4	3.9	1.1%
2003	4	5.3	1.2%
2004	1	3.4	0.8%
2005	6	5.1	1.1%
2006	2	4.9	1.2%
2007	2	3.7	0.9%
2008	6	7.0	1.6%
2009	7	6.9	1.6%
2010	5	8.2	1.8%
2011	6	7.2	1.6%
2012	13	10.3	2.5%
2013	10	9.1	2.0%

Epistemology

Table C.1: Three measures of the prevalence of epistemology in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	0	0.4	0.7%
1877	0	0.8	2.1%
1878	0	0.6	1.6%
1879	0	0.4	1.0%
1880	0	0.4	1.1%
1881	0	0.3	1.0%
1882	0	0.5	1.5%
1883	0	0.3	1.0%
1884	0	0.2	0.8%
1885	0	0.2	0.7%
1886	0	0.2	0.6%
1887	0	0.1	0.4%
1888	1	0.8	1.8%
1889	0	0.2	0.6%
1890	0	0.4	0.8%
1891	0	0.4	1.2%
1892	0	0.7	1.2%
1893	0	1.0	1.6%
1894	0	1.4	2.1%
1895	0	1.1	1.6%
1896	0	1.1	1.7%
1897	0	0.4	0.7%
1898	0	0.8	1.4%
1899	0	0.3	0.7%
1900	0	0.3	0.5%
1901	0	0.5	0.9%
1902	0	0.5	1.0%
1903	1	0.9	1.7%
1904	0	0.9	1.6%
1905	0	0.7	1.1%
1906	0	1.2	1.9%
1907	0	1.0	1.6%
1908	0	0.8	1.2%
1909	0	0.9	1.6%
1910	0	1.4	2.4%
1911	0	0.8	1.3%
1912	0	0.9	1.3%
1913	0	0.6	0.9%
1914	0	1.6	2.3%
1915	0	1.5	2.3%
1916	0	1.5	1.9%
1917	0	1.7	2.4%
1918	0	1.2	1.6%
1919	0	1.3	1.8%
1920	0	0.9	1.4%
1921	1	2.5	2.2%
1922	0	2.5	1.8%
1923	0	1.8	1.4%
1924	1	2.4	2.1%
1925	1	1.8	1.5%
1926	1	1.7	1.3%
1927	1	2.3	1.9%
1928	0	2.8	2.1%
1929	2	2.6	2.2%
1930	0	2.0	1.9%
1931	0	1.3	1.3%
1932	0	2.1	1.8%
1933	0	2.2	1.9%
1934	1	4.2	2.2%
1935	0	2.2	1.4%
1936	0	2.7	1.5%
1937	0	2.6	1.5%
1938	0	3.0	1.5%
1939	1	3.2	1.6%
1940	0	2.6	1.3%
1941	0	3.6	1.7%
1942	0	4.1	1.9%
1943	2	4.2	2.1%
1944	0	3.0	1.6%
1945	1	4.6	2.4%
1946	2	5.0	2.2%
1947	0	3.8	1.7%
1948	0	4.3	1.7%
1949	1	5.2	1.9%
1950	1	5.1	1.8%
1951	1	6.5	2.1%
1952	1	7.7	2.4%
1953	3	6.2	1.9%
1954	3	8.5	2.5%
1955	3	8.0	2.3%
1956	5	10.7	3.0%
1957	3	8.3	2.4%
1958	3	8.7	2.3%
1959	4	9.2	2.6%
1960	2	8.3	2.4%
1961	4	12.4	3.2%
1962	8	14.1	3.8%
1963	10	14.4	3.8%
1964	9	15.7	4.1%
1965	11	17.9	4.5%
1966	9	13.1	3.4%
1967	16	17.5	4.2%
1968	13	15.8	4.0%
1969	14	18.5	4.3%
1970	13	19.3	4.4%
1971	19	23.0	5.0%
1972	13	17.2	3.8%
1973	7	17.0	3.9%
1974	15	19.5	4.8%
1975	11	17.1	4.3%
1976	14	19.3	4.9%
1977	7	16.4	4.4%
1978	16	19.9	5.1%
1979	13	17.2	4.6%
1980	22	24.5	6.6%
1981	14	19.8	5.3%
1982	16	20.5	5.2%
1983	16	21.8	5.6%
1984	22	25.4	6.5%
1985	16	21.4	5.0%
1986	22	25.1	6.3%
1987	18	22.1	5.7%
1988	26	25.1	6.4%
1989	17	23.1	6.0%
1990	10	20.5	5.4%
1991	30	27.2	7.3%
1992	27	26.5	7.3%
1993	18	20.5	5.4%
1994	19	21.3	5.8%
1995	22	21.8	6.3%
1996	33	31.0	8.0%
1997	32	28.4	7.1%
1998	19	21.0	6.3%
1999	17	23.1	5.8%
2000	38	36.8	8.1%
2001	16	23.0	5.9%
2002	26	27.7	7.5%
2003	20	26.0	5.9%
2004	36	33.4	8.3%
2005	43	40.4	9.1%
2006	31	31.7	7.9%
2007	45	39.2	9.1%
2008	43	38.4	8.9%
2009	35	35.8	8.1%
2010	51	44.2	9.5%
2011	29	34.6	7.6%
2012	52	43.1	10.3%
2013	49	42.1	9.5%

Ethics

Table C.1: Three measures of the prevalence of ethics in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	5	5.0	9.9%
1877	8	6.0	14.9%
1878	5	4.3	10.7%
1879	1	3.0	8.3%
1880	7	5.2	15.8%
1881	3	2.7	8.6%
1882	5	3.9	12.1%
1883	4	4.3	13.5%
1884	1	2.3	8.8%
1885	2	2.0	9.2%
1886	2	2.1	7.2%
1887	1	1.7	5.4%
1888	2	3.0	7.2%
1889	1	1.3	5.0%
1890	4	4.2	8.9%
1891	2	2.4	7.7%
1892	3	4.1	6.9%
1893	3	3.1	4.8%
1894	7	5.8	8.4%
1895	6	6.1	8.6%
1896	10	6.5	9.9%
1897	11	6.6	11.6%
1898	5	4.0	7.5%
1899	1	2.4	5.8%
1900	4	4.2	8.4%
1901	2	3.7	6.2%
1902	7	5.5	11.4%
1903	2	2.8	5.3%
1904	3	4.1	7.2%
1905	0	3.5	5.7%
1906	2	3.7	6.0%
1907	4	4.1	6.6%
1908	7	5.9	8.9%
1909	1	2.9	5.2%
1910	2	2.5	4.4%
1911	3	4.2	6.6%
1912	2	3.4	5.2%
1913	3	3.6	5.4%
1914	3	4.1	6.0%
1915	1	4.8	7.2%
1916	3	4.8	6.3%
1917	5	5.2	7.5%
1918	3	5.1	6.6%
1919	3	3.3	4.8%
1920	1	3.5	5.4%
1921	5	8.3	7.5%
1922	2	7.1	5.0%
1923	4	8.6	6.4%
1924	3	5.8	5.0%
1925	8	10.4	8.8%
1926	5	7.0	5.7%
1927	5	6.9	5.5%
1928	8	9.0	6.7%
1929	3	5.7	4.8%
1930	5	5.9	5.6%
1931	7	6.9	6.8%
1932	9	9.3	7.6%
1933	8	6.9	6.0%
1934	9	10.7	5.6%
1935	5	6.5	3.9%
1936	17	14.9	8.0%
1937	19	15.1	8.8%
1938	17	15.3	7.7%
1939	24	22.5	11.0%
1940	21	18.0	8.7%
1941	15	14.7	6.9%
1942	22	19.4	9.3%
1943	17	17.4	8.5%
1944	22	22.3	11.8%
1945	25	21.6	11.1%
1946	22	23.2	10.3%
1947	20	20.2	8.8%
1948	35	29.7	11.6%
1949	39	29.5	10.8%
1950	48	34.5	12.5%
1951	42	34.0	10.8%
1952	43	33.4	10.6%
1953	31	32.8	10.2%
1954	38	36.6	10.8%
1955	47	41.1	11.8%
1956	55	44.6	12.7%
1957	60	47.3	13.7%
1958	65	50.7	13.7%
1959	59	44.8	12.4%
1960	58	47.5	13.8%
1961	60	49.2	12.7%
1962	65	51.8	14.0%
1963	68	56.9	15.1%
1964	78	58.9	15.4%
1965	68	57.0	14.5%
1966	74	60.8	16.0%
1967	66	60.4	14.6%
1968	79	66.8	16.8%
1969	66	59.6	14.0%
1970	63	54.4	12.5%
1971	87	70.1	15.3%
1972	98	80.0	17.8%
1973	77	68.4	15.5%
1974	90	70.1	17.4%
1975	80	66.3	16.8%
1976	83	68.8	17.4%
1977	64	59.4	15.9%
1978	77	65.9	16.9%
1979	71	65.2	17.4%
1980	73	63.9	17.1%
1981	71	65.1	17.4%
1982	70	59.9	15.2%
1983	77	68.1	17.3%
1984	78	66.4	17.0%
1985	105	84.9	20.0%
1986	91	73.1	18.4%
1987	71	61.4	16.0%
1988	78	63.3	16.1%
1989	72	66.5	17.2%
1990	72	60.3	16.0%
1991	71	61.7	16.6%
1992	66	58.0	16.1%
1993	64	53.6	14.2%
1994	58	57.0	15.7%
1995	63	54.2	15.7%
1996	64	60.4	15.7%
1997	68	63.2	15.7%
1998	52	49.3	14.8%
1999	62	56.6	14.3%
2000	66	63.5	13.9%
2001	58	52.6	13.5%
2002	51	45.1	12.2%
2003	91	72.7	16.4%
2004	65	59.1	14.7%
2005	60	57.4	12.9%
2006	69	60.7	15.1%
2007	67	63.7	14.8%
2008	93	77.3	17.8%
2009	74	67.1	15.3%
2010	76	69.3	14.9%
2011	75	62.9	13.8%
2012	72	63.7	15.2%
2013	80	70.4	15.9%

History of Philosophy

Table C.1: Three measures of the prevalence of history of philosophy in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	10	10.2	20.0%
1877	9	8.1	20.2%
1878	6	4.6	11.4%
1879	8	6.8	19.0%
1880	4	3.6	11.1%
1881	3	3.4	10.8%
1882	5	3.4	10.7%
1883	7	5.4	16.8%
1884	2	2.1	8.2%
1885	1	1.4	6.3%
1886	4	3.1	10.7%
1887	5	4.6	14.9%
1888	6	5.4	12.9%
1889	0	1.3	5.0%
1890	5	4.0	8.4%
1891	3	3.3	10.5%
1892	4	3.9	6.5%
1893	8	7.4	11.4%
1894	6	5.9	8.5%
1895	6	6.7	9.4%
1896	9	7.4	11.3%
1897	4	5.4	9.4%
1898	8	7.4	14.0%
1899	11	6.8	16.6%
1900	6	5.6	11.2%
1901	5	5.6	9.5%
1902	7	5.3	11.1%
1903	6	5.8	11.1%
1904	4	7.6	13.3%
1905	9	7.3	11.8%
1906	5	7.7	12.4%
1907	7	6.4	10.4%
1908	12	10.7	16.1%
1909	12	8.6	15.4%
1910	8	6.8	11.7%
1911	6	7.3	11.4%
1912	5	7.9	12.0%
1913	6	7.4	11.0%
1914	8	8.2	12.0%
1915	12	9.6	14.3%
1916	18	13.2	17.1%
1917	12	9.2	13.3%
1918	6	7.4	9.6%
1919	3	5.5	7.8%
1920	5	6.7	10.4%
1921	13	12.1	10.9%
1922	13	12.9	9.2%
1923	12	15.1	11.3%
1924	14	13.4	11.7%
1925	18	17.2	14.5%
1926	18	17.2	13.9%
1927	18	15.1	12.1%
1928	23	18.7	14.1%
1929	17	15.1	12.7%
1930	21	17.9	17.1%
1931	12	12.4	12.2%
1932	22	17.5	14.3%
1933	13	12.2	10.7%
1934	16	16.3	8.5%
1935	20	18.0	10.9%
1936	21	20.8	11.2%
1937	28	23.3	13.6%
1938	23	23.3	11.8%
1939	33	27.1	13.3%
1940	34	29.3	14.1%
1941	36	31.5	14.7%
1942	32	28.5	13.6%
1943	33	31.9	15.7%
1944	12	18.5	9.9%
1945	17	19.9	10.2%
1946	23	26.2	11.7%
1947	36	30.0	13.1%
1948	21	25.3	9.9%
1949	26	30.5	11.2%
1950	28	27.3	9.9%
1951	37	36.4	11.6%
1952	36	32.6	10.3%
1953	45	40.4	12.5%
1954	38	38.2	11.3%
1955	42	38.0	10.9%
1956	39	37.1	10.5%
1957	30	30.1	8.7%
1958	34	32.9	8.9%
1959	41	37.3	10.3%
1960	28	28.4	8.3%
1961	28	28.5	7.4%
1962	36	32.6	8.8%
1963	36	32.5	8.6%
1964	34	32.8	8.6%
1965	29	28.3	7.2%
1966	23	23.0	6.1%
1967	30	27.4	6.6%
1968	27	26.1	6.6%
1969	23	26.4	6.2%
1970	20	26.8	6.2%
1971	23	24.1	5.3%
1972	23	28.4	6.3%
1973	20	25.2	5.7%
1974	19	24.5	6.1%
1975	22	23.9	6.0%
1976	41	31.7	8.0%
1977	28	28.4	7.6%
1978	21	22.2	5.7%
1979	28	25.1	6.7%
1980	27	24.7	6.6%
1981	23	22.0	5.9%
1982	34	30.0	7.6%
1983	32	26.7	6.8%
1984	19	20.8	5.3%
1985	32	27.7	6.5%
1986	16	18.8	4.7%
1987	24	22.7	5.9%
1988	22	23.8	6.0%
1989	13	16.9	4.4%
1990	26	26.0	6.9%
1991	13	18.9	5.1%
1992	16	16.6	4.6%
1993	19	20.6	5.5%
1994	9	13.9	3.8%
1995	10	13.9	4.0%
1996	7	12.7	3.3%
1997	6	15.3	3.8%
1998	10	14.0	4.2%
1999	12	15.7	4.0%
2000	15	19.1	4.2%
2001	17	16.1	4.1%
2002	10	16.6	4.5%
2003	7	14.4	3.2%
2004	13	17.0	4.2%
2005	15	14.8	3.3%
2006	12	16.1	4.0%
2007	15	17.2	4.0%
2008	8	14.1	3.3%
2009	15	16.1	3.7%
2010	11	15.1	3.2%
2011	16	16.8	3.7%
2012	10	15.3	3.7%
2013	10	17.9	4.0%

Idealism

Table C.1: Three measures of the prevalence of idealism in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	4	4.0	7.9%
1877	1	3.4	8.6%
1878	2	2.4	6.0%
1879	3	2.9	8.2%
1880	1	2.3	7.0%
1881	3	4.0	13.0%
1882	7	4.7	14.7%
1883	2	2.7	8.6%
1884	5	3.4	12.9%
1885	2	2.2	10.1%
1886	5	3.4	11.6%
1887	1	2.1	6.6%
1888	7	5.0	11.8%
1889	3	2.7	10.5%
1890	5	6.5	13.9%
1891	6	4.4	14.2%
1892	14	9.3	15.5%
1893	22	13.3	20.5%
1894	20	14.1	20.5%
1895	15	11.5	16.2%
1896	15	11.1	17.1%
1897	13	11.0	19.2%
1898	18	11.9	22.4%
1899	10	8.8	21.5%
1900	13	9.1	18.2%
1901	16	12.3	20.8%
1902	15	10.6	22.1%
1903	21	14.7	28.3%
1904	17	12.3	21.6%
1905	20	13.9	22.5%
1906	22	14.4	23.2%
1907	23	16.8	27.1%
1908	22	15.4	23.3%
1909	21	16.3	29.1%
1910	16	12.6	21.7%
1911	19	14.7	23.0%
1912	21	14.8	22.4%
1913	18	14.1	21.0%
1914	16	12.6	18.5%
1915	14	11.2	16.7%
1916	16	14.1	18.3%
1917	13	12.3	17.8%
1918	14	12.5	16.2%
1919	21	15.3	21.9%
1920	15	12.3	19.0%
1921	16	13.3	12.0%
1922	23	20.5	14.5%
1923	32	22.3	16.6%
1924	21	17.8	15.5%
1925	32	21.8	18.4%
1926	14	15.3	12.3%
1927	18	16.7	13.4%
1928	12	14.4	10.8%
1929	18	16.2	13.6%
1930	14	12.6	12.0%
1931	11	11.4	11.2%
1932	20	14.9	12.2%
1933	19	18.4	16.2%
1934	20	18.7	9.8%
1935	13	14.9	9.0%
1936	16	14.3	7.7%
1937	14	14.0	8.2%
1938	17	17.5	8.9%
1939	12	14.5	7.1%
1940	8	15.4	7.4%
1941	11	15.5	7.3%
1942	8	13.8	6.6%
1943	6	11.3	5.6%
1944	8	12.2	6.5%
1945	4	8.7	4.5%
1946	14	12.9	5.8%
1947	11	13.3	5.8%
1948	9	12.3	4.8%
1949	5	10.3	3.8%
1950	2	8.4	3.1%
1951	8	11.8	3.7%
1952	4	10.2	3.2%
1953	4	9.8	3.0%
1954	3	9.8	2.9%
1955	4	9.8	2.8%
1956	8	9.6	2.7%
1957	7	8.6	2.5%
1958	10	14.7	4.0%
1959	3	8.6	2.4%
1960	3	5.8	1.7%
1961	4	7.7	2.0%
1962	0	6.5	1.8%
1963	1	5.6	1.5%
1964	0	4.4	1.2%
1965	1	3.6	0.9%
1966	0	4.3	1.1%
1967	1	4.6	1.1%
1968	2	3.5	0.9%
1969	4	4.6	1.1%
1970	1	4.1	0.9%
1971	2	3.9	0.8%
1972	1	3.3	0.7%
1973	0	2.0	0.5%
1974	0	3.7	0.9%
1975	0	2.2	0.6%
1976	0	2.6	0.7%
1977	0	3.1	0.8%
1978	0	1.8	0.5%
1979	2	3.0	0.8%
1980	1	3.5	0.9%
1981	0	2.5	0.7%
1982	0	2.8	0.7%
1983	0	2.8	0.7%
1984	0	2.0	0.5%
1985	0	2.6	0.6%
1986	0	1.8	0.4%
1987	0	2.7	0.7%
1988	0	2.4	0.6%
1989	1	2.3	0.6%
1990	0	2.7	0.7%
1991	1	2.8	0.7%
1992	0	2.8	0.8%
1993	0	1.9	0.5%
1994	2	2.4	0.7%
1995	0	1.9	0.5%
1996	0	2.1	0.5%
1997	0	2.2	0.5%
1998	0	1.3	0.4%
1999	0	1.4	0.3%
2000	0	1.8	0.4%
2001	0	1.8	0.5%
2002	0	1.7	0.5%
2003	0	1.7	0.4%
2004	0	1.9	0.5%
2005	0	1.8	0.4%
2006	0	1.4	0.3%
2007	0	1.4	0.3%
2008	0	1.6	0.4%
2009	0	1.3	0.3%
2010	0	1.4	0.3%
2011	0	1.6	0.4%
2012	0	0.7	0.2%
2013	1	1.9	0.4%

Logic and Mathematics

Table C.1: Three measures of the prevalence of logic and mathematics in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	4	3.7	7.3%
1877	3	2.8	7.0%
1878	6	4.9	12.3%
1879	4	3.2	8.8%
1880	2	2.3	6.9%
1881	2	1.6	5.1%
1882	3	2.4	7.5%
1883	5	3.8	11.9%
1884	0	0.7	2.8%
1885	1	1.0	4.5%
1886	0	0.9	3.2%
1887	2	2.3	7.3%
1888	3	2.7	6.5%
1889	0	1.1	4.2%
1890	2	2.4	5.2%
1891	1	1.6	5.1%
1892	5	4.9	8.2%
1893	4	4.3	6.7%
1894	5	5.9	8.5%
1895	5	5.4	7.6%
1896	4	4.3	6.7%
1897	4	4.5	7.9%
1898	2	3.7	7.0%
1899	3	2.9	7.1%
1900	6	4.5	8.9%
1901	0	2.3	3.9%
1902	3	4.0	8.4%
1903	4	4.9	9.3%
1904	3	4.1	7.2%
1905	11	10.0	16.2%
1906	5	5.2	8.3%
1907	4	5.9	9.5%
1908	10	8.8	13.4%
1909	3	3.3	6.0%
1910	8	8.5	14.6%
1911	5	7.2	11.3%
1912	11	9.7	14.6%
1913	6	7.5	11.2%
1914	15	11.6	17.1%
1915	10	8.3	12.3%
1916	8	7.9	10.3%
1917	12	8.3	12.1%
1918	11	8.9	11.6%
1919	4	6.0	8.6%
1920	4	4.6	7.0%
1921	5	8.3	7.5%
1922	8	13.2	9.3%
1923	14	12.8	9.6%
1924	8	9.5	8.3%
1925	8	9.8	8.2%
1926	10	10.3	8.3%
1927	20	16.2	13.0%
1928	25	16.6	12.5%
1929	18	15.8	13.3%
1930	15	14.8	14.1%
1931	15	13.3	13.0%
1932	23	20.1	16.5%
1933	29	24.2	21.2%
1934	56	40.5	21.1%
1935	35	30.7	18.6%
1936	54	43.0	23.1%
1937	41	34.6	20.3%
1938	37	33.5	16.9%
1939	38	33.3	16.3%
1940	31	30.2	14.6%
1941	29	26.3	12.3%
1942	36	30.1	14.3%
1943	28	25.9	12.7%
1944	35	28.9	15.4%
1945	23	26.6	13.7%
1946	36	32.2	14.4%
1947	50	39.7	17.3%
1948	47	41.1	16.0%
1949	57	49.3	18.1%
1950	65	53.5	19.4%
1951	64	53.9	17.2%
1952	52	51.1	16.2%
1953	59	51.7	16.0%
1954	64	54.5	16.1%
1955	58	51.5	14.8%
1956	61	55.4	15.7%
1957	58	56.6	16.4%
1958	62	58.9	15.9%
1959	60	56.9	15.7%
1960	63	59.6	17.3%
1961	70	62.0	16.1%
1962	57	58.3	15.8%
1963	57	58.5	15.5%
1964	69	62.9	16.5%
1965	76	74.1	18.8%
1966	61	62.2	16.4%
1967	66	68.1	16.5%
1968	69	67.0	16.8%
1969	76	73.6	17.2%
1970	79	71.5	16.5%
1971	84	78.4	17.1%
1972	64	64.5	14.3%
1973	48	57.8	13.1%
1974	54	53.7	13.3%
1975	48	52.5	13.3%
1976	42	47.2	12.0%
1977	38	40.5	10.9%
1978	35	41.7	10.7%
1979	39	44.2	11.8%
1980	37	42.3	11.3%
1981	45	41.1	11.0%
1982	48	45.2	11.5%
1983	38	40.0	10.2%
1984	39	44.0	11.3%
1985	44	42.2	9.9%
1986	42	43.2	10.9%
1987	35	38.3	10.0%
1988	35	37.7	9.6%
1989	39	40.9	10.6%
1990	36	35.0	9.3%
1991	23	32.2	8.7%
1992	29	32.1	8.9%
1993	34	38.6	10.2%
1994	28	34.3	9.4%
1995	29	34.2	9.9%
1996	26	33.6	8.7%
1997	38	40.2	10.0%
1998	34	34.4	10.4%
1999	40	42.2	10.7%
2000	48	47.8	10.5%
2001	37	38.8	9.9%
2002	56	48.9	13.2%
2003	43	45.7	10.3%
2004	38	41.7	10.3%
2005	40	46.1	10.3%
2006	30	36.0	8.9%
2007	37	42.0	9.8%
2008	37	39.4	9.1%
2009	45	44.5	10.1%
2010	43	48.5	10.4%
2011	38	43.0	9.4%
2012	35	38.0	9.1%
2013	22	32.8	7.4%

Metaphysics

Table C.1: Three measures of the prevalence of metaphysics in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	3	4.8	9.4%
1877	3	2.5	6.2%
1878	2	2.5	6.3%
1879	0	1.8	4.9%
1880	2	2.2	6.8%
1881	0	1.1	3.6%
1882	0	1.6	4.9%
1883	0	0.7	2.1%
1884	0	1.3	4.9%
1885	1	1.9	8.8%
1886	4	3.5	12.2%
1887	1	2.9	9.4%
1888	3	3.3	7.9%
1889	2	2.6	9.8%
1890	1	2.2	4.8%
1891	0	1.0	3.3%
1892	1	2.5	4.1%
1893	1	3.8	5.8%
1894	1	3.1	4.4%
1895	2	4.2	5.9%
1896	4	5.3	8.2%
1897	1	2.1	3.7%
1898	0	1.8	3.5%
1899	1	2.6	6.3%
1900	1	2.7	5.3%
1901	7	5.6	9.4%
1902	2	3.1	6.5%
1903	0	1.9	3.6%
1904	1	2.4	4.2%
1905	1	2.1	3.4%
1906	1	2.5	4.1%
1907	3	3.8	6.2%
1908	3	3.6	5.4%
1909	2	3.0	5.4%
1910	2	2.7	4.6%
1911	2	2.7	4.3%
1912	2	4.4	6.6%
1913	6	5.3	8.0%
1914	2	4.2	6.1%
1915	2	3.5	5.2%
1916	3	5.3	6.9%
1917	2	4.2	6.1%
1918	1	3.6	4.7%
1919	2	3.1	4.5%
1920	2	2.7	4.2%
1921	4	4.8	4.3%
1922	10	10.6	7.5%
1923	4	6.9	5.1%
1924	2	6.0	5.3%
1925	3	5.6	4.7%
1926	9	9.3	7.5%
1927	3	7.2	5.7%
1928	4	7.2	5.4%
1929	3	6.8	5.7%
1930	6	7.4	7.1%
1931	6	7.6	7.4%
1932	8	11.3	9.3%
1933	2	4.2	3.7%
1934	9	13.6	7.1%
1935	4	10.0	6.1%
1936	7	9.4	5.1%
1937	7	9.9	5.8%
1938	8	9.2	4.6%
1939	1	7.4	3.6%
1940	5	9.8	4.7%
1941	6	13.0	6.1%
1942	5	10.7	5.1%
1943	4	7.5	3.7%
1944	6	7.8	4.1%
1945	1	6.0	3.1%
1946	9	10.8	4.8%
1947	6	9.4	4.1%
1948	5	10.5	4.1%
1949	6	11.6	4.3%
1950	12	15.9	5.8%
1951	9	16.1	5.1%
1952	16	20.3	6.4%
1953	16	18.3	5.7%
1954	16	20.0	5.9%
1955	17	23.2	6.6%
1956	8	16.2	4.6%
1957	14	19.5	5.6%
1958	13	20.6	5.5%
1959	7	15.5	4.3%
1960	22	21.8	6.3%
1961	12	21.1	5.5%
1962	18	20.4	5.5%
1963	20	23.4	6.2%
1964	17	22.4	5.9%
1965	23	25.2	6.4%
1966	23	23.1	6.1%
1967	24	27.6	6.7%
1968	21	26.3	6.6%
1969	28	32.1	7.5%
1970	30	35.9	8.3%
1971	24	31.9	7.0%
1972	17	28.3	6.3%
1973	39	39.5	9.0%
1974	24	31.0	7.7%
1975	24	25.9	6.6%
1976	32	30.0	7.6%
1977	30	27.9	7.5%
1978	32	31.1	8.0%
1979	37	34.9	9.3%
1980	32	31.4	8.4%
1981	32	32.0	8.5%
1982	34	37.2	9.5%
1983	28	29.8	7.6%
1984	32	33.5	8.6%
1985	39	38.7	9.1%
1986	42	43.7	11.0%
1987	48	44.0	11.5%
1988	37	39.8	10.1%
1989	33	34.2	8.9%
1990	42	34.9	9.2%
1991	38	36.3	9.8%
1992	36	38.0	10.5%
1993	35	39.0	10.3%
1994	31	34.9	9.6%
1995	29	32.6	9.5%
1996	28	33.8	8.8%
1997	39	39.6	9.8%
1998	37	38.7	11.7%
1999	51	46.0	11.6%
2000	36	46.9	10.3%
2001	37	41.0	10.5%
2002	43	39.3	10.6%
2003	46	50.8	11.4%
2004	33	39.9	9.9%
2005	53	52.0	11.7%
2006	63	53.4	13.3%
2007	36	45.3	10.5%
2008	32	38.2	8.8%
2009	45	49.5	11.3%
2010	59	56.7	12.2%
2011	57	53.4	11.7%
2012	49	46.6	11.1%
2013	40	43.1	9.7%

Philosophy of Language

Table C.1: Three measures of the prevalence of philosophy of language in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	0	0.4	0.9%
1877	0	0.4	1.0%
1878	0	0.7	1.8%
1879	0	0.9	2.4%
1880	0	0.7	2.2%
1881	0	1.0	3.2%
1882	0	0.5	1.7%
1883	1	0.9	2.7%
1884	0	0.2	0.7%
1885	0	0.1	0.6%
1886	0	0.6	2.0%
1887	0	0.3	1.1%
1888	0	0.3	0.8%
1889	0	0.3	1.3%
1890	0	0.4	0.9%
1891	0	0.7	2.3%
1892	0	1.0	1.7%
1893	0	1.6	2.5%
1894	0	1.1	1.6%
1895	1	1.5	2.2%
1896	0	1.1	1.7%
1897	0	0.5	0.9%
1898	0	0.6	1.1%
1899	1	0.6	1.4%
1900	0	0.5	1.0%
1901	1	0.5	0.8%
1902	0	0.3	0.7%
1903	0	0.4	0.8%
1904	0	0.6	1.0%
1905	1	1.2	2.0%
1906	0	0.8	1.2%
1907	0	1.5	2.4%
1908	0	0.8	1.2%
1909	0	0.4	0.7%
1910	1	1.4	2.3%
1911	2	1.8	2.8%
1912	0	0.8	1.3%
1913	1	0.9	1.3%
1914	0	1.1	1.6%
1915	1	1.5	2.3%
1916	0	1.3	1.7%
1917	0	1.0	1.4%
1918	0	1.3	1.7%
1919	0	1.1	1.6%
1920	0	0.8	1.3%
1921	2	1.7	1.5%
1922	0	2.6	1.9%
1923	0	1.5	1.1%
1924	1	2.2	1.9%
1925	1	1.7	1.4%
1926	0	1.8	1.5%
1927	0	2.5	2.0%
1928	0	2.8	2.1%
1929	3	3.4	2.8%
1930	0	1.6	1.5%
1931	0	2.1	2.1%
1932	1	3.5	2.8%
1933	6	5.4	4.7%
1934	10	10.3	5.3%
1935	2	4.9	3.0%
1936	9	11.1	5.9%
1937	9	9.5	5.6%
1938	11	12.2	6.2%
1939	6	9.7	4.8%
1940	7	8.8	4.2%
1941	3	6.9	3.2%
1942	4	8.6	4.1%
1943	6	7.9	3.9%
1944	5	8.1	4.3%
1945	3	7.0	3.6%
1946	4	8.7	3.9%
1947	1	8.3	3.6%
1948	12	15.3	6.0%
1949	20	19.4	7.1%
1950	15	22.7	8.3%
1951	21	23.1	7.4%
1952	22	23.0	7.3%
1953	24	26.1	8.1%
1954	18	24.7	7.3%
1955	19	24.9	7.1%
1956	27	31.1	8.8%
1957	27	30.8	8.9%
1958	21	30.2	8.1%
1959	29	32.1	8.9%
1960	19	28.5	8.3%
1961	29	32.8	8.5%
1962	38	35.8	9.7%
1963	28	31.5	8.3%
1964	26	30.8	8.1%
1965	36	38.1	9.7%
1966	20	27.6	7.3%
1967	39	38.9	9.4%
1968	40	37.6	9.5%
1969	41	40.2	9.4%
1970	48	43.1	9.9%
1971	44	43.5	9.5%
1972	41	40.3	9.0%
1973	37	37.6	8.5%
1974	33	32.3	8.0%
1975	40	36.6	9.3%
1976	31	29.2	7.4%
1977	30	30.5	8.2%
1978	37	32.6	8.4%
1979	35	36.0	9.6%
1980	28	25.7	6.9%
1981	22	24.1	6.4%
1982	35	35.4	9.0%
1983	32	29.1	7.4%
1984	42	35.0	9.0%
1985	33	33.7	7.9%
1986	26	26.1	6.6%
1987	35	30.5	7.9%
1988	23	27.6	7.0%
1989	21	22.8	5.9%
1990	23	25.7	6.8%
1991	23	25.1	6.7%
1992	30	27.8	7.7%
1993	25	29.3	7.8%
1994	25	23.3	6.4%
1995	31	30.3	8.8%
1996	42	33.9	8.8%
1997	43	35.5	8.8%
1998	37	31.4	9.5%
1999	37	30.8	7.8%
2000	32	30.6	6.7%
2001	29	29.7	7.6%
2002	27	30.3	8.2%
2003	26	26.7	6.0%
2004	26	26.0	6.5%
2005	38	35.0	7.9%
2006	28	31.3	7.8%
2007	41	35.6	8.3%
2008	33	32.3	7.5%
2009	39	32.9	7.5%
2010	40	35.4	7.6%
2011	34	34.1	7.5%
2012	35	35.1	8.4%
2013	42	36.2	8.2%

Philosophy of Mind

Table C.1: Three measures of the prevalence of philosophy of mind in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	14	12.6	24.7%
1877	13	9.5	23.7%
1878	12	11.0	27.5%
1879	12	8.6	23.9%
1880	11	7.4	22.5%
1881	16	10.9	35.0%
1882	11	9.2	28.9%
1883	9	8.3	25.9%
1884	13	9.5	36.5%
1885	12	8.8	39.9%
1886	10	8.5	29.2%
1887	17	12.0	38.8%
1888	17	13.9	33.2%
1889	17	12.9	49.7%
1890	21	15.5	33.1%
1891	15	10.9	35.0%
1892	27	20.6	34.3%
1893	16	16.9	25.9%
1894	26	20.5	29.8%
1895	26	20.7	29.2%
1896	13	13.4	20.6%
1897	16	15.0	26.4%
1898	15	13.4	25.2%
1899	7	8.5	20.8%
1900	12	10.9	21.8%
1901	15	15.0	25.5%
1902	10	8.6	17.8%
1903	10	10.9	21.1%
1904	23	14.7	25.8%
1905	10	10.4	16.8%
1906	17	14.5	23.3%
1907	15	13.2	21.4%
1908	10	11.4	17.3%
1909	9	10.3	18.3%
1910	15	12.2	21.0%
1911	20	14.8	23.1%
1912	12	12.0	18.3%
1913	12	12.7	19.0%
1914	14	13.0	19.2%
1915	14	12.4	18.5%
1916	11	11.8	15.3%
1917	14	13.3	19.2%
1918	18	15.8	20.5%
1919	19	16.1	23.0%
1920	16	13.2	20.4%
1921	22	21.9	19.7%
1922	43	30.9	21.9%
1923	26	24.3	18.1%
1924	26	21.7	18.9%
1925	12	17.7	14.9%
1926	29	23.4	18.9%
1927	27	22.6	18.1%
1928	23	22.1	16.6%
1929	20	21.4	18.0%
1930	11	13.3	12.7%
1931	19	17.9	17.5%
1932	16	16.8	13.8%
1933	17	15.7	13.7%
1934	27	30.3	15.8%
1935	27	24.0	14.5%
1936	23	24.6	13.2%
1937	13	18.5	10.8%
1938	27	26.4	13.3%
1939	21	26.4	12.9%
1940	33	29.5	14.2%
1941	29	28.5	13.3%
1942	27	26.7	12.7%
1943	23	24.4	11.9%
1944	26	23.8	12.6%
1945	31	25.8	13.3%
1946	23	26.9	12.0%
1947	21	26.7	11.6%
1948	23	28.2	11.0%
1949	26	32.8	12.1%
1950	28	35.1	12.8%
1951	35	41.4	13.2%
1952	35	42.7	13.5%
1953	40	43.0	13.3%
1954	46	45.6	13.5%
1955	43	45.2	12.9%
1956	47	50.4	14.3%
1957	45	48.5	14.0%
1958	46	48.6	13.1%
1959	45	50.0	13.8%
1960	44	45.8	13.3%
1961	57	59.0	15.3%
1962	41	53.1	14.4%
1963	69	63.6	16.8%
1964	42	53.1	13.9%
1965	41	49.3	12.5%
1966	57	59.0	15.5%
1967	52	59.7	14.5%
1968	42	53.8	13.5%
1969	64	61.1	14.3%
1970	74	70.5	16.2%
1971	62	67.3	14.7%
1972	55	61.0	13.6%
1973	66	61.1	13.9%
1974	45	50.5	12.5%
1975	53	53.8	13.6%
1976	39	53.0	13.4%
1977	45	47.9	12.8%
1978	36	47.3	12.1%
1979	41	43.4	11.6%
1980	47	49.7	13.3%
1981	55	56.2	15.0%
1982	40	49.8	12.7%
1983	43	52.6	13.4%
1984	50	58.3	14.9%
1985	40	51.7	12.2%
1986	50	55.1	13.8%
1987	41	51.2	13.3%
1988	58	57.9	14.7%
1989	53	57.6	14.9%
1990	53	58.6	15.5%
1991	52	57.6	15.5%
1992	59	59.7	16.5%
1993	68	63.4	16.8%
1994	66	62.3	17.1%
1995	49	50.5	14.7%
1996	58	62.6	16.3%
1997	54	59.5	14.8%
1998	48	50.3	15.1%
1999	51	58.1	14.7%
2000	61	68.4	15.0%
2001	59	63.4	16.2%
2002	43	51.8	14.0%
2003	48	57.5	12.9%
2004	47	56.3	14.0%
2005	40	55.7	12.5%
2006	48	57.5	14.3%
2007	54	62.2	14.5%
2008	43	55.9	12.9%
2009	62	68.9	15.7%
2010	62	70.6	15.2%
2011	59	68.9	15.1%
2012	44	53.6	12.8%
2013	50	58.6	13.2%

Philosophy of Religion

Table C.1: Three measures of the prevalence of philosophy of religion in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	0	0.3	0.6%
1877	2	1.5	3.7%
1878	0	0.5	1.3%
1879	1	0.8	2.1%
1880	0	0.6	1.8%
1881	0	0.3	0.9%
1882	0	0.5	1.4%
1883	0	1.1	3.4%
1884	0	0.4	1.4%
1885	0	0.6	2.8%
1886	0	0.5	1.7%
1887	0	0.5	1.5%
1888	0	0.6	1.4%
1889	0	0.2	0.9%
1890	0	1.3	2.7%
1891	0	0.4	1.2%
1892	0	0.9	1.5%
1893	0	1.1	1.7%
1894	1	1.7	2.5%
1895	1	1.7	2.4%
1896	3	2.5	3.9%
1897	1	1.6	2.8%
1898	0	0.7	1.2%
1899	0	0.5	1.2%
1900	0	1.2	2.3%
1901	1	1.3	2.2%
1902	1	1.5	3.1%
1903	1	1.3	2.5%
1904	0	1.0	1.8%
1905	2	2.0	3.3%
1906	0	0.9	1.5%
1907	1	1.3	2.1%
1908	0	0.4	0.7%
1909	1	1.6	2.8%
1910	0	0.7	1.2%
1911	0	1.3	2.0%
1912	1	1.2	1.8%
1913	0	0.9	1.3%
1914	1	1.3	2.0%
1915	2	2.1	3.1%
1916	3	3.0	3.9%
1917	0	1.3	1.8%
1918	3	3.3	4.2%
1919	2	2.2	3.2%
1920	2	3.1	4.8%
1921	3	2.9	2.6%
1922	0	3.0	2.1%
1923	3	4.4	3.3%
1924	8	5.8	5.1%
1925	1	2.9	2.4%
1926	3	4.3	3.5%
1927	2	4.6	3.7%
1928	3	6.5	4.9%
1929	1	4.0	3.4%
1930	3	3.7	3.6%
1931	3	3.2	3.1%
1932	0	2.3	1.9%
1933	1	2.5	2.2%
1934	0	3.3	1.7%
1935	2	3.7	2.2%
1936	1	4.4	2.3%
1937	2	2.8	1.6%
1938	3	3.6	1.8%
1939	0	2.9	1.4%
1940	1	4.2	2.0%
1941	2	4.5	2.1%
1942	2	4.3	2.1%
1943	2	4.5	2.2%
1944	6	5.8	3.1%
1945	8	7.6	3.9%
1946	1	5.1	2.3%
1947	3	6.0	2.6%
1948	8	8.5	3.3%
1949	9	8.4	3.1%
1950	4	5.1	1.8%
1951	7	8.2	2.6%
1952	4	6.1	1.9%
1953	1	4.9	1.5%
1954	8	8.9	2.6%
1955	7	7.6	2.2%
1956	10	9.5	2.7%
1957	7	7.8	2.2%
1958	10	11.5	3.1%
1959	8	8.4	2.3%
1960	14	11.1	3.2%
1961	17	15.0	3.9%
1962	8	8.7	2.3%
1963	5	8.0	2.1%
1964	12	8.9	2.3%
1965	7	8.0	2.0%
1966	5	6.8	1.8%
1967	10	9.0	2.2%
1968	3	6.2	1.5%
1969	6	7.9	1.9%
1970	2	6.6	1.5%
1971	7	7.5	1.6%
1972	4	6.2	1.4%
1973	5	7.4	1.7%
1974	11	9.6	2.4%
1975	3	6.7	1.7%
1976	4	6.4	1.6%
1977	10	8.4	2.3%
1978	5	6.7	1.7%
1979	5	5.1	1.4%
1980	4	6.0	1.6%
1981	2	5.5	1.5%
1982	3	7.7	2.0%
1983	8	9.5	2.4%
1984	4	5.7	1.5%
1985	4	6.1	1.4%
1986	7	7.3	1.8%
1987	3	5.7	1.5%
1988	7	9.2	2.3%
1989	7	5.7	1.5%
1990	6	6.1	1.6%
1991	2	3.8	1.0%
1992	3	4.1	1.1%
1993	6	7.3	1.9%
1994	4	4.5	1.2%
1995	1	3.6	1.0%
1996	2	2.6	0.7%
1997	3	4.5	1.1%
1998	3	4.0	1.2%
1999	1	3.5	0.9%
2000	4	5.8	1.3%
2001	2	3.6	0.9%
2002	0	3.2	0.9%
2003	0	3.7	0.8%
2004	3	3.3	0.8%
2005	2	5.6	1.3%
2006	0	3.6	0.9%
2007	2	6.4	1.5%
2008	5	4.6	1.1%
2009	1	4.5	1.0%
2010	3	5.6	1.2%
2011	4	6.3	1.4%
2012	1	4.2	1.0%
2013	1	4.2	0.9%

Philosophy of Science

Table C.1: Three measures of the prevalence of philosophy of science in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	7	6.0	11.8%
1877	0	1.9	4.7%
1878	1	2.5	6.4%
1879	6	3.9	10.9%
1880	2	3.1	9.5%
1881	1	2.0	6.4%
1882	0	2.5	7.9%
1883	0	1.4	4.4%
1884	3	3.1	11.8%
1885	0	1.6	7.1%
1886	2	3.5	12.0%
1887	4	2.9	9.3%
1888	1	3.4	8.1%
1889	1	1.7	6.7%
1890	3	3.5	7.6%
1891	0	2.6	8.5%
1892	1	4.9	8.2%
1893	6	7.1	10.9%
1894	1	3.9	5.7%
1895	3	5.0	7.0%
1896	3	4.9	7.6%
1897	0	3.3	5.8%
1898	2	4.3	8.1%
1899	3	2.8	6.9%
1900	2	5.1	10.1%
1901	2	4.5	7.6%
1902	1	3.3	7.0%
1903	4	4.0	7.7%
1904	2	4.5	7.9%
1905	2	4.6	7.4%
1906	3	4.9	7.9%
1907	2	3.7	6.0%
1908	0	3.0	4.5%
1909	1	2.9	5.2%
1910	2	4.0	6.9%
1911	3	4.2	6.5%
1912	4	4.9	7.4%
1913	4	5.6	8.3%
1914	4	5.2	7.6%
1915	1	3.9	5.8%
1916	3	4.1	5.3%
1917	5	6.4	9.3%
1918	11	8.3	10.8%
1919	4	5.5	7.9%
1920	3	4.6	7.1%
1921	23	17.6	15.9%
1922	22	20.4	14.5%
1923	12	15.3	11.4%
1924	14	14.2	12.3%
1925	17	13.8	11.6%
1926	14	14.4	11.6%
1927	17	16.9	13.5%
1928	12	14.6	11.0%
1929	18	15.2	12.8%
1930	19	16.7	15.9%
1931	11	11.9	11.7%
1932	11	13.8	11.3%
1933	8	11.0	9.7%
1934	33	29.8	15.5%
1935	33	29.2	17.7%
1936	22	24.3	13.0%
1937	24	24.3	14.2%
1938	29	28.2	14.2%
1939	34	28.8	14.1%
1940	35	29.8	14.4%
1941	44	37.8	17.6%
1942	30	27.6	13.2%
1943	35	30.3	14.8%
1944	19	22.6	12.0%
1945	39	33.3	17.2%
1946	45	37.1	16.6%
1947	36	37.6	16.4%
1948	44	37.7	14.7%
1949	26	34.4	12.7%
1950	36	35.9	13.1%
1951	54	46.9	14.9%
1952	51	45.2	14.3%
1953	53	50.4	15.6%
1954	62	52.7	15.6%
1955	55	54.8	15.7%
1956	53	47.3	13.4%
1957	49	46.8	13.5%
1958	49	47.8	12.9%
1959	65	59.5	16.4%
1960	53	49.9	14.5%
1961	57	55.9	14.5%
1962	58	49.8	13.5%
1963	47	47.0	12.4%
1964	55	52.9	13.9%
1965	68	59.0	15.0%
1966	69	62.2	16.4%
1967	68	60.7	14.7%
1968	60	55.2	13.9%
1969	65	62.5	14.6%
1970	67	63.1	14.5%
1971	73	67.6	14.7%
1972	81	69.1	15.3%
1973	79	72.3	16.4%
1974	66	61.3	15.2%
1975	63	59.6	15.1%
1976	66	64.7	16.4%
1977	69	63.3	17.0%
1978	81	76.4	19.6%
1979	58	57.2	15.2%
1980	55	57.5	15.4%
1981	66	64.0	17.1%
1982	81	70.5	17.9%
1983	66	64.8	16.5%
1984	73	64.6	16.6%
1985	63	65.8	15.5%
1986	73	68.6	17.2%
1987	71	68.7	17.9%
1988	77	71.9	18.3%
1989	85	73.2	19.0%
1990	73	70.4	18.6%
1991	78	68.6	18.4%
1992	70	65.7	18.2%
1993	91	79.1	21.0%
1994	90	76.3	21.0%
1995	78	69.0	20.1%
1996	105	89.4	23.2%
1997	99	86.7	21.6%
1998	70	61.4	18.5%
1999	102	91.5	23.1%
2000	123	101.1	22.2%
2001	102	87.5	22.4%
2002	95	82.2	22.1%
2003	135	111.2	25.1%
2004	108	93.2	23.1%
2005	121	105.0	23.6%
2006	101	84.2	20.9%
2007	110	90.2	21.0%
2008	113	97.8	22.6%
2009	95	87.5	19.9%
2010	98	88.4	19.0%
2011	118	104.2	22.9%
2012	92	85.9	20.6%
2013	114	98.9	22.3%

Social and Political

Table C.1: Three measures of the prevalence of social and political in each year.

Year	Count	Weighted Count	Weighted Frequency
1876	3	3.1	6.0%
1877	1	2.5	6.2%
1878	4	4.1	10.2%
1879	1	3.1	8.7%
1880	3	4.2	12.8%
1881	2	3.0	9.6%
1882	1	2.5	7.9%
1883	4	3.0	9.4%
1884	2	2.3	9.0%
1885	3	2.0	9.0%
1886	2	2.7	9.3%
1887	0	1.1	3.6%
1888	2	3.3	8.0%
1889	2	1.4	5.5%
1890	3	4.7	9.9%
1891	2	2.1	6.9%
1892	3	5.1	8.5%
1893	4	3.6	5.6%
1894	2	4.3	6.2%
1895	4	5.5	7.7%
1896	3	6.4	9.9%
1897	6	5.7	10.0%
1898	3	4.3	8.0%
1899	3	4.0	9.8%
1900	5	5.0	10.1%
1901	6	5.6	9.6%
1902	2	4.8	10.0%
1903	1	3.4	6.5%
1904	3	4.2	7.5%
1905	5	5.2	8.4%
1906	7	5.8	9.3%
1907	3	3.9	6.3%
1908	2	4.7	7.2%
1909	5	5.0	9.0%
1910	2	4.1	7.0%
1911	4	4.6	7.2%
1912	7	5.1	7.8%
1913	11	8.1	12.1%
1914	4	4.6	6.8%
1915	9	7.4	11.1%
1916	12	9.6	12.5%
1917	6	5.9	8.5%
1918	9	8.5	11.0%
1919	12	9.3	13.3%
1920	13	10.1	15.5%
1921	14	15.3	13.8%
1922	15	13.3	9.4%
1923	21	17.2	12.8%
1924	15	13.9	12.1%
1925	12	12.6	10.6%
1926	13	14.6	11.8%
1927	13	12.8	10.3%
1928	15	12.9	9.7%
1929	10	8.8	7.4%
1930	8	6.8	6.4%
1931	15	10.7	10.5%
1932	10	8.9	7.3%
1933	4	7.4	6.5%
1934	7	11.1	5.8%
1935	14	14.2	8.6%
1936	12	13.1	7.0%
1937	11	13.3	7.8%
1938	18	18.5	9.3%
1939	28	24.1	11.8%
1940	23	22.8	11.0%
1941	30	24.6	11.5%
1942	36	29.3	14.0%
1943	38	31.7	15.5%
1944	36	26.6	14.2%
1945	39	29.0	14.9%
1946	39	31.4	14.0%
1947	39	28.4	12.4%
1948	42	36.0	14.0%
1949	49	33.5	12.3%
1950	29	25.0	9.1%
1951	30	29.0	9.2%
1952	38	32.6	10.3%
1953	37	31.0	9.6%
1954	35	32.7	9.7%
1955	41	33.6	9.6%
1956	32	33.0	9.4%
1957	37	32.0	9.2%
1958	38	33.6	9.1%
1959	27	28.7	7.9%
1960	28	28.4	8.3%
1961	27	28.2	7.3%
1962	28	27.3	7.4%
1963	32	28.3	7.5%
1964	33	30.4	8.0%
1965	25	25.0	6.3%
1966	35	31.9	8.4%
1967	31	29.3	7.1%
1968	33	29.7	7.5%
1969	30	31.0	7.3%
1970	25	27.9	6.4%
1971	26	32.5	7.1%
1972	39	39.4	8.8%
1973	47	40.4	9.2%
1974	41	39.8	9.9%
1975	41	41.6	10.5%
1976	38	35.5	9.0%
1977	48	42.7	11.4%
1978	35	35.5	9.1%
1979	39	36.5	9.7%
1980	43	37.9	10.1%
1981	38	36.6	9.8%
1982	26	28.2	7.2%
1983	42	39.9	10.2%
1984	26	28.0	7.2%
1985	39	42.0	9.9%
1986	23	29.1	7.3%
1987	33	30.1	7.8%
1988	25	29.0	7.4%
1989	40	37.3	9.7%
1990	36	33.7	8.9%
1991	34	31.5	8.5%
1992	25	27.4	7.6%
1993	13	18.0	4.8%
1994	30	30.7	8.4%
1995	27	27.5	8.0%
1996	17	18.5	4.8%
1997	15	20.6	5.1%
1998	22	24.1	7.3%
1999	21	23.1	5.8%
2000	28	28.8	6.3%
2001	28	28.1	7.2%
2002	16	20.3	5.5%
2003	24	28.4	6.4%
2004	33	27.9	6.9%
2005	27	26.1	5.9%
2006	19	22.2	5.5%
2007	21	23.0	5.4%
2008	20	26.5	6.1%
2009	22	25.0	5.7%
2010	18	22.6	4.9%
2011	20	22.9	5.0%
2012	15	21.5	5.1%
2013	25	28.6	6.4%

Weighted Frequency of Categories in Each Year

Table C.2: Weighted frequency by year for the six larger topics.

Year	Ethics	History of Philosophy	Logic and Mathematics	Philosophy of Mind	Philosophy of Science	Social and Political
1876	9.9%	20.0%	7.3%	24.7%	11.8%	6.0%
1877	14.9%	20.2%	7.0%	23.7%	4.7%	6.2%
1878	10.7%	11.4%	12.3%	27.5%	6.4%	10.2%
1879	8.3%	19.0%	8.8%	23.9%	10.9%	8.7%
1880	15.8%	11.1%	6.9%	22.5%	9.5%	12.8%
1881	8.6%	10.8%	5.1%	35.0%	6.4%	9.6%
1882	12.1%	10.7%	7.5%	28.9%	7.9%	7.9%
1883	13.5%	16.8%	11.9%	25.9%	4.4%	9.4%
1884	8.8%	8.2%	2.8%	36.5%	11.8%	9.0%
1885	9.2%	6.3%	4.5%	39.9%	7.1%	9.0%
1886	7.2%	10.7%	3.2%	29.2%	12.0%	9.3%
1887	5.4%	14.9%	7.3%	38.8%	9.3%	3.6%
1888	7.2%	12.9%	6.5%	33.2%	8.1%	8.0%
1889	5.0%	5.0%	4.2%	49.7%	6.7%	5.5%
1890	8.9%	8.4%	5.2%	33.1%	7.6%	9.9%
1891	7.7%	10.5%	5.1%	35.0%	8.5%	6.9%
1892	6.9%	6.5%	8.2%	34.3%	8.2%	8.5%
1893	4.8%	11.4%	6.7%	25.9%	10.9%	5.6%
1894	8.4%	8.5%	8.5%	29.8%	5.7%	6.2%
1895	8.6%	9.4%	7.6%	29.2%	7.0%	7.7%
1896	9.9%	11.3%	6.7%	20.6%	7.6%	9.9%
1897	11.6%	9.4%	7.9%	26.4%	5.8%	10.0%
1898	7.5%	14.0%	7.0%	25.2%	8.1%	8.0%
1899	5.8%	16.6%	7.1%	20.8%	6.9%	9.8%
1900	8.4%	11.2%	8.9%	21.8%	10.1%	10.1%
1901	6.2%	9.5%	3.9%	25.5%	7.6%	9.6%
1902	11.4%	11.1%	8.4%	17.8%	7.0%	10.0%
1903	5.3%	11.1%	9.3%	21.1%	7.7%	6.5%
1904	7.2%	13.3%	7.2%	25.8%	7.9%	7.5%
1905	5.7%	11.8%	16.2%	16.8%	7.4%	8.4%
1906	6.0%	12.4%	8.3%	23.3%	7.9%	9.3%
1907	6.6%	10.4%	9.5%	21.4%	6.0%	6.3%
1908	8.9%	16.1%	13.4%	17.3%	4.5%	7.2%
1909	5.2%	15.4%	6.0%	18.3%	5.2%	9.0%
1910	4.4%	11.7%	14.6%	21.0%	6.9%	7.0%
1911	6.6%	11.4%	11.3%	23.1%	6.5%	7.2%
1912	5.2%	12.0%	14.6%	18.3%	7.4%	7.8%
1913	5.4%	11.0%	11.2%	19.0%	8.3%	12.1%
1914	6.0%	12.0%	17.1%	19.2%	7.6%	6.8%
1915	7.2%	14.3%	12.3%	18.5%	5.8%	11.1%
1916	6.3%	17.1%	10.3%	15.3%	5.3%	12.5%
1917	7.5%	13.3%	12.1%	19.2%	9.3%	8.5%
1918	6.6%	9.6%	11.6%	20.5%	10.8%	11.0%
1919	4.8%	7.8%	8.6%	23.0%	7.9%	13.3%
1920	5.4%	10.4%	7.0%	20.4%	7.1%	15.5%
1921	7.5%	10.9%	7.5%	19.7%	15.9%	13.8%
1922	5.0%	9.2%	9.3%	21.9%	14.5%	9.4%
1923	6.4%	11.3%	9.6%	18.1%	11.4%	12.8%
1924	5.0%	11.7%	8.3%	18.9%	12.3%	12.1%
1925	8.8%	14.5%	8.2%	14.9%	11.6%	10.6%
1926	5.7%	13.9%	8.3%	18.9%	11.6%	11.8%
1927	5.5%	12.1%	13.0%	18.1%	13.5%	10.3%
1928	6.7%	14.1%	12.5%	16.6%	11.0%	9.7%
1929	4.8%	12.7%	13.3%	18.0%	12.8%	7.4%
1930	5.6%	17.1%	14.1%	12.7%	15.9%	6.4%
1931	6.8%	12.2%	13.0%	17.5%	11.7%	10.5%
1932	7.6%	14.3%	16.5%	13.8%	11.3%	7.3%
1933	6.0%	10.7%	21.2%	13.7%	9.7%	6.5%
1934	5.6%	8.5%	21.1%	15.8%	15.5%	5.8%
1935	3.9%	10.9%	18.6%	14.5%	17.7%	8.6%
1936	8.0%	11.2%	23.1%	13.2%	13.0%	7.0%
1937	8.8%	13.6%	20.3%	10.8%	14.2%	7.8%
1938	7.7%	11.8%	16.9%	13.3%	14.2%	9.3%
1939	11.0%	13.3%	16.3%	12.9%	14.1%	11.8%
1940	8.7%	14.1%	14.6%	14.2%	14.4%	11.0%
1941	6.9%	14.7%	12.3%	13.3%	17.6%	11.5%
1942	9.3%	13.6%	14.3%	12.7%	13.2%	14.0%
1943	8.5%	15.7%	12.7%	11.9%	14.8%	15.5%
1944	11.8%	9.9%	15.4%	12.6%	12.0%	14.2%
1945	11.1%	10.2%	13.7%	13.3%	17.2%	14.9%
1946	10.3%	11.7%	14.4%	12.0%	16.6%	14.0%
1947	8.8%	13.1%	17.3%	11.6%	16.4%	12.4%
1948	11.6%	9.9%	16.0%	11.0%	14.7%	14.0%
1949	10.8%	11.2%	18.1%	12.1%	12.7%	12.3%
1950	12.5%	9.9%	19.4%	12.8%	13.1%	9.1%
1951	10.8%	11.6%	17.2%	13.2%	14.9%	9.2%
1952	10.6%	10.3%	16.2%	13.5%	14.3%	10.3%
1953	10.2%	12.5%	16.0%	13.3%	15.6%	9.6%
1954	10.8%	11.3%	16.1%	13.5%	15.6%	9.7%
1955	11.8%	10.9%	14.8%	12.9%	15.7%	9.6%
1956	12.7%	10.5%	15.7%	14.3%	13.4%	9.4%
1957	13.7%	8.7%	16.4%	14.0%	13.5%	9.2%
1958	13.7%	8.9%	15.9%	13.1%	12.9%	9.1%
1959	12.4%	10.3%	15.7%	13.8%	16.4%	7.9%
1960	13.8%	8.3%	17.3%	13.3%	14.5%	8.3%
1961	12.7%	7.4%	16.1%	15.3%	14.5%	7.3%
1962	14.0%	8.8%	15.8%	14.4%	13.5%	7.4%
1963	15.1%	8.6%	15.5%	16.8%	12.4%	7.5%
1964	15.4%	8.6%	16.5%	13.9%	13.9%	8.0%
1965	14.5%	7.2%	18.8%	12.5%	15.0%	6.3%
1966	16.0%	6.1%	16.4%	15.5%	16.4%	8.4%
1967	14.6%	6.6%	16.5%	14.5%	14.7%	7.1%
1968	16.8%	6.6%	16.8%	13.5%	13.9%	7.5%
1969	14.0%	6.2%	17.2%	14.3%	14.6%	7.3%
1970	12.5%	6.2%	16.5%	16.2%	14.5%	6.4%
1971	15.3%	5.3%	17.1%	14.7%	14.7%	7.1%
1972	17.8%	6.3%	14.3%	13.6%	15.3%	8.8%
1973	15.5%	5.7%	13.1%	13.9%	16.4%	9.2%
1974	17.4%	6.1%	13.3%	12.5%	15.2%	9.9%
1975	16.8%	6.0%	13.3%	13.6%	15.1%	10.5%
1976	17.4%	8.0%	12.0%	13.4%	16.4%	9.0%
1977	15.9%	7.6%	10.9%	12.8%	17.0%	11.4%
1978	16.9%	5.7%	10.7%	12.1%	19.6%	9.1%
1979	17.4%	6.7%	11.8%	11.6%	15.2%	9.7%
1980	17.1%	6.6%	11.3%	13.3%	15.4%	10.1%
1981	17.4%	5.9%	11.0%	15.0%	17.1%	9.8%
1982	15.2%	7.6%	11.5%	12.7%	17.9%	7.2%
1983	17.3%	6.8%	10.2%	13.4%	16.5%	10.2%
1984	17.0%	5.3%	11.3%	14.9%	16.6%	7.2%
1985	20.0%	6.5%	9.9%	12.2%	15.5%	9.9%
1986	18.4%	4.7%	10.9%	13.8%	17.2%	7.3%
1987	16.0%	5.9%	10.0%	13.3%	17.9%	7.8%
1988	16.1%	6.0%	9.6%	14.7%	18.3%	7.4%
1989	17.2%	4.4%	10.6%	14.9%	19.0%	9.7%
1990	16.0%	6.9%	9.3%	15.5%	18.6%	8.9%
1991	16.6%	5.1%	8.7%	15.5%	18.4%	8.5%
1992	16.1%	4.6%	8.9%	16.5%	18.2%	7.6%
1993	14.2%	5.5%	10.2%	16.8%	21.0%	4.8%
1994	15.7%	3.8%	9.4%	17.1%	21.0%	8.4%
1995	15.7%	4.0%	9.9%	14.7%	20.1%	8.0%
1996	15.7%	3.3%	8.7%	16.3%	23.2%	4.8%
1997	15.7%	3.8%	10.0%	14.8%	21.6%	5.1%
1998	14.8%	4.2%	10.4%	15.1%	18.5%	7.3%
1999	14.3%	4.0%	10.7%	14.7%	23.1%	5.8%
2000	13.9%	4.2%	10.5%	15.0%	22.2%	6.3%
2001	13.5%	4.1%	9.9%	16.2%	22.4%	7.2%
2002	12.2%	4.5%	13.2%	14.0%	22.1%	5.5%
2003	16.4%	3.2%	10.3%	12.9%	25.1%	6.4%
2004	14.7%	4.2%	10.3%	14.0%	23.1%	6.9%
2005	12.9%	3.3%	10.3%	12.5%	23.6%	5.9%
2006	15.1%	4.0%	8.9%	14.3%	20.9%	5.5%
2007	14.8%	4.0%	9.8%	14.5%	21.0%	5.4%
2008	17.8%	3.3%	9.1%	12.9%	22.6%	6.1%
2009	15.3%	3.7%	10.1%	15.7%	19.9%	5.7%
2010	14.9%	3.2%	10.4%	15.2%	19.0%	4.9%
2011	13.8%	3.7%	9.4%	15.1%	22.9%	5.0%
2012	15.2%	3.7%	9.1%	12.8%	20.6%	5.1%
2013	15.9%	4.0%	7.4%	13.2%	22.3%	6.4%

Table C.2: Weighted frequency by year for the six smaller topics.

Year	Aesthetics	Epistemology	Idealism	Metaphysics	Philosophy of Language	Philosophy of Religion
1876	0.9%	0.7%	7.9%	9.4%	0.9%	0.6%
1877	1.7%	2.1%	8.6%	6.2%	1.0%	3.7%
1878	4.5%	1.6%	6.0%	6.3%	1.8%	1.3%
1879	1.9%	1.0%	8.2%	4.9%	2.4%	2.1%
1880	2.5%	1.1%	7.0%	6.8%	2.2%	1.8%
1881	2.6%	1.0%	13.0%	3.6%	3.2%	0.9%
1882	0.7%	1.5%	14.7%	4.9%	1.7%	1.4%
1883	0.3%	1.0%	8.6%	2.1%	2.7%	3.4%
1884	2.1%	0.8%	12.9%	4.9%	0.7%	1.4%
1885	1.0%	0.7%	10.1%	8.8%	0.6%	2.8%
1886	0.3%	0.6%	11.6%	12.2%	2.0%	1.7%
1887	1.6%	0.4%	6.6%	9.4%	1.1%	1.5%
1888	0.4%	1.8%	11.8%	7.9%	0.8%	1.4%
1889	0.6%	0.6%	10.5%	9.8%	1.3%	0.9%
1890	3.9%	0.8%	13.9%	4.8%	0.9%	2.7%
1891	4.3%	1.2%	14.2%	3.3%	2.3%	1.2%
1892	3.3%	1.2%	15.5%	4.1%	1.7%	1.5%
1893	2.6%	1.6%	20.5%	5.8%	2.5%	1.7%
1894	1.8%	2.1%	20.5%	4.4%	1.6%	2.5%
1895	2.4%	1.6%	16.2%	5.9%	2.2%	2.4%
1896	1.4%	1.7%	17.1%	8.2%	1.7%	3.9%
1897	1.6%	0.7%	19.2%	3.7%	0.9%	2.8%
1898	0.5%	1.4%	22.4%	3.5%	1.1%	1.2%
1899	1.9%	0.7%	21.5%	6.3%	1.4%	1.2%
1900	2.1%	0.5%	18.2%	5.3%	1.0%	2.3%
1901	3.6%	0.9%	20.8%	9.4%	0.8%	2.2%
1902	0.8%	1.0%	22.1%	6.5%	0.7%	3.1%
1903	2.1%	1.7%	28.3%	3.6%	0.8%	2.5%
1904	1.0%	1.6%	21.6%	4.2%	1.0%	1.8%
1905	1.5%	1.1%	22.5%	3.4%	2.0%	3.3%
1906	0.8%	1.9%	23.2%	4.1%	1.2%	1.5%
1907	0.4%	1.6%	27.1%	6.2%	2.4%	2.1%
1908	0.8%	1.2%	23.3%	5.4%	1.2%	0.7%
1909	1.3%	1.6%	29.1%	5.4%	0.7%	2.8%
1910	2.2%	2.4%	21.7%	4.6%	2.3%	1.2%
1911	0.5%	1.3%	23.0%	4.3%	2.8%	2.0%
1912	1.5%	1.3%	22.4%	6.6%	1.3%	1.8%
1913	0.6%	0.9%	21.0%	8.0%	1.3%	1.3%
1914	0.8%	2.3%	18.5%	6.1%	1.6%	2.0%
1915	1.2%	2.3%	16.7%	5.2%	2.3%	3.1%
1916	0.4%	1.9%	18.3%	6.9%	1.7%	3.9%
1917	0.5%	2.4%	17.8%	6.1%	1.4%	1.8%
1918	1.5%	1.6%	16.2%	4.7%	1.7%	4.2%
1919	1.6%	1.8%	21.9%	4.5%	1.6%	3.2%
1920	3.6%	1.4%	19.0%	4.2%	1.3%	4.8%
1921	2.0%	2.2%	12.0%	4.3%	1.5%	2.6%
1922	2.8%	1.8%	14.5%	7.5%	1.9%	2.1%
1923	2.8%	1.4%	16.6%	5.1%	1.1%	3.3%
1924	1.9%	2.1%	15.5%	5.3%	1.9%	5.1%
1925	3.0%	1.5%	18.4%	4.7%	1.4%	2.4%
1926	3.8%	1.3%	12.3%	7.5%	1.5%	3.5%
1927	0.9%	1.9%	13.4%	5.7%	2.0%	3.7%
1928	4.1%	2.1%	10.8%	5.4%	2.1%	4.9%
1929	3.2%	2.2%	13.6%	5.7%	2.8%	3.4%
1930	2.2%	1.9%	12.0%	7.1%	1.5%	3.6%
1931	3.3%	1.3%	11.2%	7.4%	2.1%	3.1%
1932	1.1%	1.8%	12.2%	9.3%	2.8%	1.9%
1933	3.4%	1.9%	16.2%	3.7%	4.7%	2.2%
1934	1.6%	2.2%	9.8%	7.1%	5.3%	1.7%
1935	4.0%	1.4%	9.0%	6.1%	3.0%	2.2%
1936	1.9%	1.5%	7.7%	5.1%	5.9%	2.3%
1937	1.8%	1.5%	8.2%	5.8%	5.6%	1.6%
1938	3.7%	1.5%	8.9%	4.6%	6.2%	1.8%
1939	2.0%	1.6%	7.1%	3.6%	4.8%	1.4%
1940	3.3%	1.3%	7.4%	4.7%	4.2%	2.0%
1941	3.3%	1.7%	7.3%	6.1%	3.2%	2.1%
1942	3.2%	1.9%	6.6%	5.1%	4.1%	2.1%
1943	3.4%	2.1%	5.6%	3.7%	3.9%	2.2%
1944	4.5%	1.6%	6.5%	4.1%	4.3%	3.1%
1945	2.0%	2.4%	4.5%	3.1%	3.6%	3.9%
1946	2.1%	2.2%	5.8%	4.8%	3.9%	2.3%
1947	2.4%	1.7%	5.8%	4.1%	3.6%	2.6%
1948	3.2%	1.7%	4.8%	4.1%	6.0%	3.3%
1949	2.6%	1.9%	3.8%	4.3%	7.1%	3.1%
1950	2.4%	1.8%	3.1%	5.8%	8.3%	1.8%
1951	2.1%	2.1%	3.7%	5.1%	7.4%	2.6%
1952	3.5%	2.4%	3.2%	6.4%	7.3%	1.9%
1953	2.5%	1.9%	3.0%	5.7%	8.1%	1.5%
1954	1.7%	2.5%	2.9%	5.9%	7.3%	2.6%
1955	3.2%	2.3%	2.8%	6.6%	7.1%	2.2%
1956	2.0%	3.0%	2.7%	4.6%	8.8%	2.7%
1957	2.8%	2.4%	2.5%	5.6%	8.9%	2.2%
1958	3.5%	2.3%	4.0%	5.5%	8.1%	3.1%
1959	3.0%	2.6%	2.4%	4.3%	8.9%	2.3%
1960	2.6%	2.4%	1.7%	6.3%	8.3%	3.2%
1961	3.7%	3.2%	2.0%	5.5%	8.5%	3.9%
1962	2.9%	3.8%	1.8%	5.5%	9.7%	2.3%
1963	2.2%	3.8%	1.5%	6.2%	8.3%	2.1%
1964	2.3%	4.1%	1.2%	5.9%	8.1%	2.3%
1965	2.1%	4.5%	0.9%	6.4%	9.7%	2.0%
1966	1.6%	3.4%	1.1%	6.1%	7.3%	1.8%
1967	2.4%	4.2%	1.1%	6.7%	9.4%	2.2%
1968	2.5%	4.0%	0.9%	6.6%	9.5%	1.5%
1969	2.2%	4.3%	1.1%	7.5%	9.4%	1.9%
1970	2.5%	4.4%	0.9%	8.3%	9.9%	1.5%
1971	2.0%	5.0%	0.8%	7.0%	9.5%	1.6%
1972	2.7%	3.8%	0.7%	6.3%	9.0%	1.4%
1973	2.6%	3.9%	0.5%	9.0%	8.5%	1.7%
1974	1.9%	4.8%	0.9%	7.7%	8.0%	2.4%
1975	2.2%	4.3%	0.6%	6.6%	9.3%	1.7%
1976	1.7%	4.9%	0.7%	7.6%	7.4%	1.6%
1977	1.2%	4.4%	0.8%	7.5%	8.2%	2.3%
1978	2.3%	5.1%	0.5%	8.0%	8.4%	1.7%
1979	1.9%	4.6%	0.8%	9.3%	9.6%	1.4%
1980	1.6%	6.6%	0.9%	8.4%	6.9%	1.6%
1981	1.6%	5.3%	0.7%	8.5%	6.4%	1.5%
1982	1.5%	5.2%	0.7%	9.5%	9.0%	2.0%
1983	2.0%	5.6%	0.7%	7.6%	7.4%	2.4%
1984	1.6%	6.5%	0.5%	8.6%	9.0%	1.5%
1985	1.7%	5.0%	0.6%	9.1%	7.9%	1.4%
1986	1.5%	6.3%	0.4%	11.0%	6.6%	1.8%
1987	1.7%	5.7%	0.7%	11.5%	7.9%	1.5%
1988	1.6%	6.4%	0.6%	10.1%	7.0%	2.3%
1989	1.5%	6.0%	0.6%	8.9%	5.9%	1.5%
1990	1.1%	5.4%	0.7%	9.2%	6.8%	1.6%
1991	1.7%	7.3%	0.7%	9.8%	6.7%	1.0%
1992	0.7%	7.3%	0.8%	10.5%	7.7%	1.1%
1993	1.5%	5.4%	0.5%	10.3%	7.8%	1.9%
1994	0.9%	5.8%	0.7%	9.6%	6.4%	1.2%
1995	1.3%	6.3%	0.5%	9.5%	8.8%	1.0%
1996	1.2%	8.0%	0.5%	8.8%	8.8%	0.7%
1997	1.6%	7.1%	0.5%	9.8%	8.8%	1.1%
1998	0.7%	6.3%	0.4%	11.7%	9.5%	1.2%
1999	1.0%	5.8%	0.3%	11.6%	7.8%	0.9%
2000	1.2%	8.1%	0.4%	10.3%	6.7%	1.3%
2001	1.2%	5.9%	0.5%	10.5%	7.6%	0.9%
2002	1.1%	7.5%	0.5%	10.6%	8.2%	0.9%
2003	1.2%	5.9%	0.4%	11.4%	6.0%	0.8%
2004	0.8%	8.3%	0.5%	9.9%	6.5%	0.8%
2005	1.1%	9.1%	0.4%	11.7%	7.9%	1.3%
2006	1.2%	7.9%	0.3%	13.3%	7.8%	0.9%
2007	0.9%	9.1%	0.3%	10.5%	8.3%	1.5%
2008	1.6%	8.9%	0.4%	8.8%	7.5%	1.1%
2009	1.6%	8.1%	0.3%	11.3%	7.5%	1.0%
2010	1.8%	9.5%	0.3%	12.2%	7.6%	1.2%
2011	1.6%	7.6%	0.4%	11.7%	7.5%	1.4%
2012	2.5%	10.3%	0.2%	11.1%	8.4%	1.0%
2013	2.0%	9.5%	0.4%	9.7%	8.2%	0.9%