| Country | 1984 | 1990 | 2002 | 2012 |
| Benin | 02 | 04 | 09 | 20 |
| Burkinafaso | 01 | 02 | 06 | 16 |
| Nigeria | 10 | 20 | 100 | 400+ |
| Ivory Coast | 12 | 32 | 50 | 98 |
| Mali | 01 | 06 | 10 | 13 |
| Cameroun | 04 | 12 | 20 | 30 |
| Senegal | 04 | 14 | 28 | 35 |
| Niger | 01 | 03 | 05 | 11 |
| Total | 09 | 70 | 123 | 243 |