| Year joined | Country | % Correct |
|---|---|---|
| 1993 | Belgium | 100%
|
| 2013 | Croatia | 100%
|
| 2004 | Estonia | 100%
|
| 1995 | Finland | 100%
|
| 1993 | France | 100%
|
| 1993 | Germany | 100%
|
| 1993 | Greece | 100%
|
| 1993 | Ireland | 100%
|
| 1993 | Italy | 100%
|
| 2004 | Latvia | 100%
|
| 2004 | Lithuania | 100%
|
| 2004 | Poland | 100%
|
| 2004 | Slovakia | 100%
|
| 2004 | Slovenia | 100%
|
| 1993 | Spain | 100%
|
| 1995 | Austria | 94%
|
| 2007 | Bulgaria | 94%
|
| 1993 | Denmark | 94%
|
| 2004 | Hungary | 94%
|
| 1993 | Portugal | 94%
|
| 2007 | Romania | 94%
|
| 1995 | Sweden | 94%
|
| 1993 | The Netherlands | 94%
|
| 2004 | Czech Republic | 89%
|
| 1993 | Luxembourg | 83%
|
| 2004 | Malta | 83%
|
| 2004 | Cyprus | 67%
|