| Years | Country | % Correct |
|---|---|---|
| Current | China | 91%
|
| 1917-1991 | Soviet Union | 90%
|
| Current | North Korea | 83%
|
| Current | Vietnam | 74%
|
| 1960-1992 | Cuba | 65%
|
| 1789-1799 | France | 53%
|
| 1975-1979 | Cambodia | 46%
|
| 1967-1991 | Albania | 32%
|
| 1926-1929 | Mexico | 16%
|