| Year Joined | Answer | % Correct |
|---|---|---|
| 1960 | Saudi Arabia | 100%
|
| 1960 | Iran | 97%
|
| 1960 | Iraq | 97%
|
| 1960 | Kuwait | 97%
|
| 1967 | UAE | 97%
|
| 1961 | Qatar | 91%
|
| 1960 | Venezuela | 84%
|
| 1962 | Libya | 78%
|
| 1971 | Nigeria | 75%
|
| 1969 | Algeria | 72%
|
| 2007 | Angola | 59%
|
| 2018 | Republic of the Congo | 47%
|
| 1975 | Gabon | 38%
|
| 2017 | Equatorial Guinea | 31%
|
| 1973 | Ecuador | 28%
|