| Country, Initial & Latest Survey Year | AD Value in Initial Survey | AD Value in Latest Survey | Decline |
| sub-Saharan Africa | |||
| Benin, 1981/82 & 2006 | 19.2 | 13.3 | 5.9 |
| Mali, 1987 & 2006 | 17.1 | 12.9 | 4.2 |
| Rwanda, 1983 & 2010/11 | 19.8 | 10.5 | 9.3 |
| Uganda, 1988/89 & 2011 | 12.6 | 8.9 | 3.7 |
| North Africa & West Asia | |||
| Egypt, 1974/75 & 2008 | 16.9 | 13.7 | 3.2 |
| Iran, 1976/77 & 2002 | 13.4 | 9.3 | 4.1 |
| Turkey, 1963 & 2008 | 17.7 | 10.6 | 7.1 |
| Asia | |||
| Mongolia, 1994 & 2008 | 15.2 | 8.8 | 6.4 |
| Viet Nam, 1988 & 2010/11 | 16.5 | 10.6 | 5.9 |
| Latin America | |||
| Colombia, 1969 & 2010 | 13.8 | 7.9 | 5.9 |
| Guyana, 1975 & 2009 | 12.5 | 8.0 | 4.5 |
| Haiti, 1977 & 2005/06 | 15.9 | 9.7 | 6.2 |
| Honduras, 1981 & 2005/06 | 12.6 | 8.7 | 3.9 |
| Paraguay, 1977 & 2008 | 11.2 | 6.4 | 4.8 |
| Peru, 1969/70 & 2010 | 12.9 | 8.4 | 4.5 |
| Means | 15.2 | 9.8 | 5.3 |