| Country | Year | |||||
|---|---|---|---|---|---|---|
| Benin | 1998 | 2,937,812 | 3,006,651 | 5,944,463 | ||
| Cabo Verde | 1998 | 192,497 | 208,415 | 400,912 | ||
| Gambia, The | 1998 | 611,397 | 619,941 | 1,231,338 | ||
| Ghana | 1998 | 8,761,106 | 8,888,409 | 17,649,515 | ||
| Guinea | 1998 | 3,777,676 | 3,821,369 | 7,599,045 | ||
| Cote d'Ivoire | 1998 | 7,872,684 | 7,594,375 | 15,467,059 | ||
| Liberia | 1998 | 1,117,692 | 1,126,827 | 2,244,519 | ||
| Mali | 1998 | 4,774,299 | 4,939,348 | 9,713,647 | ||
| Mauritania | 1998 | 1,101,071 | 1,186,631 | 2,287,702 | ||
| Niger | 1998 | 4,762,983 | 4,777,038 | 9,540,021 | ||
| Nigeria | 1998 | 57,871,538 | 55,462,469 | 113,334,007 | ||
| Guinea-Bissau | 1998 | 568,771 | 608,627 | 1,177,398 | ||
| Senegal | 1998 | 4,208,262 | 4,471,323 | 8,679,585 | ||
| Saint Helena | 1998 | 3,564 | 3,455 | 7,019 | ||
| Sierra Leone | 1998 | 1,744,109 | 1,859,225 | 3,603,334 | ||
| Togo | 1998 | 2,257,040 | 2,291,112 | 4,548,152 | ||
| Burkina Faso | 1998 | 5,046,213 | 5,334,034 | 10,380,247 |