| Year | Country | % Correct |
|---|---|---|
| 1958 | France | 100%
|
| 1958 | Belgium | 99%
|
| 1958 | Germany | 99%
|
| 1958 | Italy | 99%
|
| 1986 | Portugal | 99%
|
| 1986 | Spain | 99%
|
| 1973 | United Kingdom | 99%
|
| 1958 | Netherlands | 98%
|
| 2004 | Poland | 98%
|
| 1995 | Sweden | 98%
|
| 1995 | Austria | 97%
|
| 2013 | Croatia | 97%
|
| 1973 | Denmark | 97%
|
| 2004 | Estonia | 97%
|
| 1995 | Finland | 97%
|
| 1981 | Greece | 97%
|
| 1973 | Ireland | 97%
|
| 2004 | Latvia | 97%
|
| 2004 | Lithuania | 97%
|
| 1958 | Luxembourg | 97%
|
| 2007 | Romania | 97%
|
| 2004 | Slovakia | 97%
|
| 2004 | Hungary | 96%
|
| 2004 | Slovenia | 96%
|
| 2007 | Bulgaria | 95%
|
| 2004 | Czechia | 95%
|
| 2004 | Malta | 91%
|
| 2004 | Cyprus | 86%
|