| EC prior to May 2004 |
| Austria |
| Belgium |
| Denmark |
| Finland |
| France |
| Germany |
| Greece |
| Ireland |
| Italy |
| Luxembourg |
| Netherlands |
| Portugal |
| Spain |
| Sweden |
| United Kingdom |
Forum member from Non-EC state |
| Switzerland |
| Norway |
| Israel |
| Iceland |
| USA |
|
| Joined EC May 2004 |
| Slovakia |
| Malta |
| Lithuania |
| Latvia |
| Hungary |
| Czech Republic |
| Cyprus |
| Slovenia |
| Poland |
| Estonia |
EC Candidate or applicant state |
| Bulgaria |
| Turkey |
| Romania |
| Croatia |
| Macedonia |
| Other non-EC states |
|