| Country | Years | % Correct |
|---|---|---|
| Austria | 64.8 | 100%
|
| Belgium | 66.3 | 100%
|
| Canada | 68.2 | 100%
|
| Denmark | 70.3 | 100%
|
| Finland | 64.2 | 100%
|
| France | 66.4 | 100%
|
| Iceland | 71.0 | 100%
|
| Ireland | 65.6 | 100%
|
| Italy | 65.7 | 100%
|
| Netherlands | 71.4 | 100%
|
| Norway | 71.6 | 100%
|
| San Marino | 71.6 | 100%
|
| Spain | 61.8 | 100%
|
| Sweden | 71.1 | 100%
|
| Switzerland | 68.9 | 100%
|
| United States | 68.1 | 100%
|
| Andorra | 67.2 | 86%
|
| Argentina | 61.3 | 86%
|
| Australia | 69.0 | 86%
|
| Greece | 66.2 | 86%
|
| Liechtenstein | 65.3 | 86%
|
| Luxembourg | 65.5 | 86%
|
| Monaco | 68.0 | 86%
|
| New Zealand | 69.3 | 86%
|
| United Kingdom | 68.6 | 86%
|
| Uruguay | 65.6 | 71%
|
| Bulgaria | 61.5 | 57%
|
| Czechoslovakia | 63.4 | 57%
|
| Hungary | 62.1 | 57%
|
| Israel | 69.9 | 57%
|
| Romania | 60.5 | 57%
|
| West Germany | 66.8 | 57%
|