| Last | Country | % Correct |
|---|---|---|
| - | Canada | 98%
|
| - | Finland | 98%
|
| - | Sweden | 98%
|
| 2001 | United States of America | 98%
|
| - | Italy | 96%
|
| - | Norway | 95%
|
| 2015 | Russia | 95%
|
| 2018 | Austria | 94%
|
| - | Germany | 94%
|
| - | Switzerland | 93%
|
| - | France | 91%
|
| 2014 | Poland | 88%
|
| 2006 | Japan | 87%
|
| - | Czech Republic | 83%
|
| 2018 | Slovenia | 83%
|
| - | Estonia | 81%
|
| 2007 | China | 80%
|
| 1996 | Slovakia | 78%
|
| 2017 | South Korea | 77%
|
| 1991 | Belarus | 59%
|
| 1985 | Bulgaria | 56%
|
| 1984 | Bosnia and Herzegovina | 43%
|