| Year | Countries | % Correct |
|---|---|---|
| 2010 | China | 99%
|
| 2000 | China | 99%
|
| 1970 | China | 99%
|
| 1970 | Francoist Spain | 99%
|
| 1940 | Francoist Spain | 99%
|
| 1910 | German Empire | 99%
|
| 2010 | Germany | 99%
|
| 2000 | Germany | 99%
|
| 1910 | Kingdom of Spain | 99%
|
| 1870 | Kingdom of Spain | 99%
|
| 1940 | Nazi Germany | 99%
|
| 1910 | Qing Dynasty | 99%
|
| 1870 | Qing Dynasty | 99%
|
| 1940 | Republic of China | 99%
|
| 2010 | Spain | 99%
|
| 2000 | Spain | 99%
|
| 1970 | United Kingdom | 99%
|
| 1940 | United Kingdom | 99%
|
| 1910 | United Kingdom | 99%
|
| 2010 | United States | 99%
|
| 2000 | United States | 99%
|
| 1970 | United States | 99%
|
| 1940 | United States | 99%
|
| 1910 | United States | 99%
|
| 1870 | United States | 99%
|
| 1970 | West Germany | 99%
|
| 1940 | British Raj | 97%
|
| 1910 | British Raj | 97%
|
| 1870 | British Raj | 97%
|
| 2010 | France | 97%
|
| 2000 | France | 97%
|
| 1970 | France | 97%
|
| 1910 | France | 97%
|
| 1870 | France | 97%
|
| 2010 | India | 97%
|
| 2000 | India | 97%
|
| 1970 | India | 97%
|
| 2010 | Japan | 97%
|
| 2000 | Japan | 97%
|
| 1970 | Japan | 97%
|
| 1940 | Japanese Empire | 97%
|
| 1910 | Japanese Empire | 97%
|
| 1870 | Japanese Empire | 97%
|
| 2010 | United Kingdom | 97%
|
| 2000 | United Kingdom | 97%
|
| 1870 | United Kingdom | 97%
|
| 2010 | Canada | 96%
|
| 2000 | Canada | 96%
|
| 1970 | Canada | 96%
|
| 1940 | Canada | 96%
|
| 1910 | Canada | 96%
|
| 2010 | Brazil | 94%
|
| 2000 | Brazil | 94%
|
| 1970 | Brazil | 94%
|
| 1940 | Brazil | 94%
|
| 1940 | Kingdom of Italy | 94%
|
| 1910 | Kingdom of Italy | 94%
|
| 1910 | Russian Empire | 94%
|
| 1870 | Russian Empire | 94%
|
| 2010 | Italy | 93%
|
| 2000 | Italy | 93%
|
| 1970 | Italy | 93%
|
| 1870 | Italy | 93%
|
| 2010 | Mexico | 93%
|
| 2000 | Mexico | 93%
|
| 1970 | Mexico | 93%
|
| 2010 | Russia | 93%
|
| 2000 | Russia | 93%
|
| 2010 | Indonesia | 88%
|
| 2000 | Indonesia | 88%
|
| 1970 | Argentina | 87%
|
| 1940 | Argentina | 87%
|
| 1910 | Argentina | 87%
|
| 2010 | South Korea | 86%
|
| 2000 | South Korea | 86%
|
| 1970 | Soviet Union | 86%
|
| 1940 | Soviet Union | 86%
|
| 1940 | Occupied Poland | 84%
|
| 1910 | Russian Poland | 84%
|
| 1870 | Russian Poland | 84%
|
| 1870 | Bohemia (Austria-Hungary) | 81%
|
| 1970 | Netherlands | 81%
|
| 1870 | Netherlands | 81%
|
| 1910 | Belgium | 72%
|
| 1870 | Belgium | 72%
|
| 1940 | Vichy France | 12%
|
| 1940 | Dutch East Indies | 10%
|
| 1910 | Dutch East Indies | 10%
|
| 1870 | Dutch East Indies | 10%
|
| 1870 | North German Confederation | 9%
|