| Year | Country | % Correct |
|---|---|---|
| 1949 | China | 100%
|
| 1922 | Soviet Union | 100%
|
| 1946 | Bulgaria | 92%
|
| 1949 | Hungary | 92%
|
| 1924 | Mongolia | 92%
|
| 1948 | North Korea | 92%
|
| 1944 | Poland | 92%
|
| 1947 | Romania | 92%
|
| 1976 | Vietnam | 92%
|
| 1975 | Angola | 85%
|
| 1959 | Cuba | 85%
|
| 1948 | Czechoslovakia | 85%
|
| 1975 | Laos | 85%
|
| 1945 | Yugoslavia | 85%
|
| 1978 | Afghanistan | 77%
|
| 1975 | Cambodia | 77%
|
| 1949 | East Germany | 77%
|
| 1975 | Mozambique | 77%
|
| 1946 | Albania | 69%
|
| 1987 | Ethiopia | 62%
|
| 1979 | Grenada | 62%
|
| 1945 | North Vietnam | 46%
|
| 1970 | Rep. of the Congo | 46%
|
| 1969 | Somalia | 46%
|
| 1975 | Benin | 38%
|
| 1967 | South Yemen | 31%
|