Member| Joined
| | Austria | 1995
| | Belgium | 1985
| | Bulgaria | ---- not yet
| | Cyprus | ---- not yet
| | Czech Republic | 2007
| | Denmark | 1996 partial member
| | Estonia | 2007
| | Finland | 1996
| | France | 1985
| | Germany | 1985
| | Greece | 1992
| | Hungary | 2007
| | Iceland | 1999 associated
| | Ireland | 2000 partial member
| | Italy | 1990
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Member| Joined
| | Latvia | 2007
| | Lithuania | 2007
| | Luxembourg | 1985
| | Malta | 2007
| | Netherlands | 1985
| | Norway | 1999 associated
| | Poland | 2007
| | Portugal | 1991
| | Romania | ---- not yet
| | Slovakia | 2007
| | Slovenia | 2007
| | Spain | 1991
| | Sweden | 1996
| | Switzerland | 2008
| | United Kingdon | 1999 partial member
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