VCF9023 Strength of Nonvoter Preference: Presidential

QUESTION:
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(ALL YEARS:  ASKED OF Rs WHO DID NOT VOTE):
1948,1952,1956,1960,1964,1968:  
Who (1948: whom) would you have voted for if you had voted?
1980,1984,1988,1992,1996:  
How about the election for president?  Did you prefer one of the 
candidates for president?  (IF YES:) Who did you prefer?

VALID_CODES:
------------
1.   Preference:  Democrat
2.   Preference:  Republican
3.   Preference:  Other
7.   No preference (1968 and later)

MISSING_CODES:
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9.   DK; NA; refused; no Post IW
0.   R voted or DK/NA/refused to say if voted (for
     president)
Inap. question not used

NOTES:
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This is a follow-up to VCF0704-VCF0706.
GENERAL NOTE:
In 1952,1956,1960,1964 no category appeared (coded) for "no preference."
Although a category appeared for "no preference" in 1968, R was not
asked the filter question, "Did you prefer one of the candidates for
president?" and the absence of this filter was reflected in the small
1968 "no preference" N (presumably volunteered responses). In 1980, 
1984, 1988 and 1992 Rs who replied "no" to the filter question were 
coded 7 here.
1956 NOTE:
One case from dual "nonvoter, NA preference; voted but not for 
president" has been coded 9 here.  
1968 NOTE:
One case originally coded "Nixon or Wallace" has been coded 9 here.
2004 NOTE:
Code 5, "Ralph Nader" and code 7, "Other" have been coded 3 here.

WEIGHT:
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VCF0009/VCF0009a

TYPE:
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Numeric  Dec 0

SOURCE_VARS:
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1952:  520178 
1956:  560203
1960:  600201 
1964:  640286
1968:  680316 
1980:  801014,801015
1984:  840805,840806 
1988:  880774,880775
1992:  925634 
1996:  961098,961099
2000:  001277
2004:  045028,045029