| Date Joined | Answer | % Correct |
|---|---|---|
| 2011 | South Sudan | 100%
|
| 2006 | Montenegro | 94%
|
| 2000 | Serbia | 87%
|
| 1993 | North Macedonia | 81%
|
| 1993 | Czechia | 61%
|
| 1993 | Slovakia | 61%
|
| 1993 | Eritrea | 45%
|
| 1992 | Kazakhstan | 45%
|
| 1992 | Uzbekistan | 39%
|
| 1994 | Palau | 29%
|