| Year | Country | % Correct |
|---|---|---|
| 1969 | United States | 99%
|
| 1988 | France | 98%
|
| 1987 | Germany | 96%
|
| 1989 | United Kingdom | 96%
|
| 1998 | China | 95%
|
| 2007 | Russia | 95%
|
| 1990 | Italy | 93%
|
| 1979 | Japan | 93%
|
| 2006 | Brazil | 92%
|
| 2007 | India | 91%
|
| 2004 | Spain | 91%
|
| 2007 | Mexico | 90%
|
| 2008 | Australia | 88%
|
| 2004 | Canada | 88%
|
| 2006 | South Korea | 83%
|
| 2017 | Indonesia | 78%
|