| Joined | Country | % Correct |
|---|---|---|
| 1981 | Antigua and Barbuda | 71%
|
| 1990 | Namibia | 71%
|
| 2009 | Rwanda | 71%
|
| 1983 | St. Kitts and Nevis | 71%
|
| 2022 | Gabon | 57%
|
| 1995 | Mozambique | 57%
|
| 1995 | Cameroon | 43%
|
| 2022 | Togo | 43%
|
| 1984 | Brunei | 29%
|
| 1982 | Maldives | 14%
|