| Debut Year | Country | % Correct |
|---|---|---|
| 1956 | France | 97%
|
| 1956 | Germany | 97%
|
| 1956 | Luxembourg | 97%
|
| 1958 | Sweden | 97%
|
| 1956 | Italy | 96%
|
| 1960 | Norway | 96%
|
| 1961 | Spain | 96%
|
| 1956 | Switzerland | 96%
|
| 1957 | United Kingdom | 96%
|
| 1956 | Belgium | 94%
|
| 1956 | Netherlands | 94%
|
| 1957 | Denmark | 93%
|
| 1965 | Ireland | 93%
|
| 1961 | Finland | 92%
|
| 1957 | Austria | 91%
|
| 1964 | Portugal | 90%
|
| 1961 | Yugoslavia | 86%
|
| 1959 | Monaco | 85%
|
| 1973 | Israel | 82%
|
| 1971 | Malta | 73%
|