| Year | Country | % Correct |
|---|---|---|
| 2015 | United States | 99%
|
| 2014 | United Kingdom | 96%
|
| 2005 | Canada | 95%
|
| 2009 | Sweden | 94%
|
| 2013 | France | 93%
|
| 2009 | Norway | 93%
|
| 2005 | Spain | 93%
|
| 2017 | Germany | 92%
|
| 2001 | Netherlands | 92%
|
| 2018 | Australia | 91%
|
| 2017 | Finland | 90%
|
| 2003 | Belgium | 89%
|
| 2012 | Denmark | 89%
|
| 2015 | Ireland | 87%
|
| 2010 | Mexico | 87%
|
| 2013 | New Zealand | 87%
|
| 2010 | Portugal | 87%
|
| 2013 | Brazil | 85%
|
| 2010 | Iceland | 83%
|
| 2010 | Argentina | 78%
|
| 2015 | Luxembourg | 77%
|
| 2016 | Colombia | 65%
|
| 2006 | South Africa | 62%
|
| 2013 | Uruguay | 52%
|
| 2017 | Malta | 46%
|
| 2019 | Taiwan | 42%
|