| Date | Countries | % Correct |
|---|---|---|
| 1957 | France | 100%
|
| 1957 | Italy | 100%
|
| 1995 | Austria | 96%
|
| 1957 | Belgium | 96%
|
| 2013 | Croatia | 96%
|
| 1995 | Finland | 96%
|
| 1957 | Germany | 96%
|
| 1981 | Greece | 96%
|
| 1973 | Ireland | 96%
|
| 1957 | Luxembourg | 96%
|
| 1957 | Netherlands | 96%
|
| 1986 | Portugal | 96%
|
| 2007 | Romania | 96%
|
| 2004 | Slovakia | 96%
|
| 2004 | Slovenia | 96%
|
| 1986 | Spain | 96%
|
| 1995 | Sweden | 96%
|
| 2004 | Czechia | 93%
|
| 2004 | Hungary | 93%
|
| 2004 | Latvia | 93%
|
| 2004 | Lithuania | 93%
|
| 1973-2020 | United Kingdom | 93%
|
| 2007 | Bulgaria | 89%
|
| 1973 | Denmark | 89%
|
| 2004 | Estonia | 89%
|
| 2004 | Malta | 85%
|
| 2004 | Poland | 85%
|
| 2004 | Cyprus | 74%
|