| Year Joined | Member | % Correct |
|---|---|---|
| 1949 | Canada | 97%
|
| 1949 | France | 97%
|
| 1949 | UK | 97%
|
| 1949 | USA | 97%
|
| 1949 | Belgium | 94%
|
| 1955 | Germany | 94%
|
| 1949 | Norway | 94%
|
| 1949 | Italy | 92%
|
| 1949 | Netherlands | 92%
|
| 1949 | Portugal | 92%
|
| 2004 | Slovenia | 92%
|
| 1982 | Spain | 92%
|
| 2009 | Croatia | 86%
|
| 1949 | Denmark | 86%
|
| 1952 | Greece | 86%
|
| 1949 | Luxembourg | 86%
|
| 2004 | Latvia | 83%
|
| 2004 | Lithuania | 83%
|
| 2017 | Montenegro | 83%
|
| 1999 | Poland | 83%
|
| 2004 | Slovakia | 83%
|
| 1952 | Turkey | 83%
|
| 2004 | Estonia | 81%
|
| 1999 | Hungary | 81%
|
| 2004 | Romania | 81%
|
| 2004 | Bulgaria | 78%
|
| 1949 | Iceland | 78%
|
| 1999 | Czech Republic | 75%
|
| 2009 | Albania | 69%
|