| Existant | Countries | % Correct |
|---|---|---|
| 1860-1943 | United Kingdom | 99%
|
| 1860-1946 | France | 97%
|
| 1899-1917 | Germany | 96%
|
| 1898-1945 | Japan | 95%
|
| 1869-1902 | United States | 93%
|
| 1900-1920 | Russia | 92%
|
| 1901-1943 | Italy | 91%
|
| 1901-1917 | Austria-Hungary | 85%
|
| 1902-1931 | Belgium | 72%
|