| Country | Year | |||||
|---|---|---|---|---|---|---|
| Benin | 1999 | 3,038,717 | 3,102,340 | 6,141,057 | ||
| Cabo Verde | 1999 | 196,937 | 212,901 | 409,838 | ||
| Gambia, The | 1999 | 629,785 | 639,119 | 1,268,904 | ||
| Ghana | 1999 | 8,925,786 | 9,064,749 | 17,990,535 | ||
| Guinea | 1999 | 3,898,584 | 3,941,225 | 7,839,809 | ||
| Cote d'Ivoire | 1999 | 8,074,226 | 7,794,107 | 15,868,333 | ||
| Liberia | 1999 | 1,188,858 | 1,198,481 | 2,387,339 | ||
| Mali | 1999 | 4,912,092 | 5,086,134 | 9,998,226 | ||
| Mauritania | 1999 | 1,130,527 | 1,218,813 | 2,349,340 | ||
| Niger | 1999 | 4,926,499 | 4,933,972 | 9,860,471 | ||
| Nigeria | 1999 | 59,269,464 | 56,826,043 | 116,095,507 | ||
| Guinea-Bissau | 1999 | 582,239 | 622,636 | 1,204,875 | ||
| Senegal | 1999 | 4,308,233 | 4,583,116 | 8,891,349 | ||
| Saint Helena | 1999 | 3,593 | 3,484 | 7,077 | ||
| Sierra Leone | 1999 | 1,739,023 | 1,856,022 | 3,595,045 | ||
| Togo | 1999 | 2,322,497 | 2,358,161 | 4,680,658 | ||
| Burkina Faso | 1999 | 5,217,172 | 5,504,093 | 10,721,265 |