| Time Period | Country | % Correct |
|---|---|---|
| 1906 - 1972 | Mexico (Horcón Tract) | 96%
|
| 1914 | Mexico (Veracruz) | 96%
|
| 1803 - 1818 | Canada (Louisiana Purchase) | 94%
|
| 1945 - 1952 | Japan | 91%
|
| 1945 - 1972 | Japan (Ryuku Islands) | 91%
|
| 1898 - 1946 | Philippines | 90%
|
| 1776 - present | United States | 90%
|
| 1898 - 1902 and 1906 - 1909 | Cuba | 88%
|
| 1945 - 1952 | Germany (American Zone of Occupation) | 84%
|
| 1831 - 1832 | United Kingdom (Falkland Islands) | 82%
|
| 1903 - 1979 | Panama (Panama Canal Zone) | 73%
|
| 1915 - 1934 | Haiti | 71%
|
| 1944 - 1986 | Marshall Islands | 69%
|
| 1947 - 1994 | Palau | 66%
|
| 1945 - 1948 | South Korea | 66%
|
| 1947 - 1986 | Micronesia | 65%
|
| 1945 - 1955 | Austria (American Zone of Occupation) | 62%
|
| 1914 - 1971 | Nicaragua (Corn Islands) | 57%
|
| 1916 - 1924 and 1965 - 1966 | Dominican Republic | 55%
|
| 1863 - 1972 | Honduras (Swan Islands) | 54%
|
| 1856 - 1981 | Colombia (Serrana Bank) | 51%
|
| 1938 - 1979 | Kiribati (Line, Phoenix, Canton, and Enderbury Islands) | 48%
|