| Gap (years) | Country | % Correct |
|---|---|---|
| 11.6 | Russia | 90%
|
| 9.8 | Ukraine | 80%
|
| 11.5 | Belarus | 70%
|
| 9.3 | Estonia | 55%
|
| 9.6 | Latvia | 55%
|
| 11.0 | Lithuania | 55%
|
| 10.0 | Syria | 35%
|
| 9.4 | Vietnam | 35%
|
| 10.2 | Rwanda | 30%
|
| 9.1 | El Salvador | 15%
|