| Year of join | Country | % Correct |
|---|---|---|
| 1995 | Austria | 96%
|
| 1957 | Belgium | 96%
|
| Estonia | 96%
| |
| Finland | 96%
| |
| 1981 | Greece | 96%
|
| Ireland | 96%
| |
| Luxembourg | 96%
| |
| Netherlands | 96%
| |
| 1986 | Portugal | 96%
|
| Spain | 96%
| |
| France | 92%
| |
| Germany | 92%
| |
| Hungary | 92%
| |
| Italy | 92%
| |
| Lithuania | 92%
| |
| Poland | 92%
| |
| Romania | 92%
| |
| Slovakia | 92%
| |
| Slovenia | 92%
| |
| Sweden | 92%
| |
| 2007 | Bulgaria | 88%
|
| 2013 | Croatia | 88%
|
| Czech Republic | 88%
| |
| 1973 | Denmark | 88%
|
| Latvia | 88%
| |
| Malta | 84%
| |
| 2004 | Cyprus | 76%
|