| Year | Countries | % Correct |
|---|---|---|
| 1998-2000 | Ethiopia | 86%
|
| 1984-85 | Ethiopia | 86%
|
| 2011-12 | Somalia | 84%
|
| 1991-92 | Somalia | 84%
|
| 1998 | Sudan | 76%
|
| 2012 | Niger | 72%
|
| 2005-06 | Niger | 72%
|
| 2016-present | Yemen | 70%
|
| 1998-2004 | DR Congo | 66%
|
| 2017-present | South Sudan | 63%
|
| 2012 | Mali | 61%
|
| 1996 | North Korea | 54%
|
| 1980-81 | Uganda | 52%
|
| 2012 | Mauritania | 49%
|
| 2012 | Senegal | 38%
|
| 2012 | Burkina Faso | 34%
|
| 2012 | Gambia | 27%
|