| Joined | Member | % Correct |
|---|---|---|
| 1961 | United Kingdom | 98%
|
| 1961 | United States | 98%
|
| 1961 | Canada | 97%
|
| 1961 | Germany | 97%
|
| 1961 | Spain | 97%
|
| 1961 | Sweden | 97%
|
| 1961 | France | 96%
|
| 1961 | Norway | 96%
|
| 1961 | Portugal | 95%
|
| 1971 | Australia | 94%
|
| 1961 | Belgium | 94%
|
| 1962 | Italy | 94%
|
| 1964 | Japan | 94%
|
| 1969 | Finland | 93%
|
| 1961 | Netherlands | 93%
|
| 1961 | Austria | 92%
|
| 1961 | Denmark | 92%
|
| 1996 | Poland | 92%
|
| 1961 | Ireland | 91%
|
| 1973 | New Zealand | 91%
|
| 1961 | Greece | 90%
|
| 1961 | Switzerland | 90%
|
| 1961 | Iceland | 88%
|
| 1961 | Luxembourg | 88%
|
| 1994 | Mexico | 88%
|
| 1996 | South Korea | 88%
|
| 2000 | Slovakia | 87%
|
| 1995 | Czechia | 86%
|
| 1961 | Turkey | 86%
|
| 1996 | Hungary | 85%
|
| 2010 | Slovenia | 85%
|
| 2016 | Latvia | 83%
|
| 2010 | Estonia | 82%
|
| 2018 | Lithuania | 82%
|
| 2010 | Israel | 66%
|
| 2010 | Chile | 65%
|
| 2020 | Colombia | 55%
|
| 2021 | Costa Rica | 44%
|