| 2000 | 2012 | |
|---|---|---|
| United Arab Emirates | 61.0 | 56.0 |
| Kuwait | 68.0 | 62.0 |
| Iraq | 37.0 | 42.0 |
| Nigeria | 12.0 | 16.0 |
| Gabon | 18.0 | 23.0 |
| Qatar | 57.0 | 59.0 |
| Iran (Islamic Republic of) | 51.0 | 60.0 |
| Libya | 60.0 | 63.0 |
| Venezuela (Bolivarian Republic of) | 48.0 | 49.0 |
| Angola | 10.0 | 17.0 |
| Ecuador | 44.0 | 51.0 |
| Saudi Arabia | 54.0 | 66.0 |
| Algeria | 52.0 | 63.0 |
| Equatorial Guinea | 17.0 | 21.0 |
| Congo | 14.0 | 19.0 |