| Years | Country | % Correct |
|---|---|---|
| Current | China | 90%
|
| 1917-1991 | Soviet Union | 90%
|
| Current | North Korea | 82%
|
| Current | Vietnam | 74%
|
| 1960-1992 | Cuba | 65%
|
| 1789-1799 | France | 52%
|
| 1975-1979 | Cambodia | 47%
|
| 1967-1991 | Albania | 33%
|
| 1926-1929 | Mexico | 15%
|