| 2000 | 1997 | |
|---|---|---|
| Migori | 99.5 | |
| Nyandarua | 99.2 | |
| Nyeri | 98.6 | |
| Muranga | 98.4 | |
| Kiambu | 98.0 | |
| Nairobi | 90.2 | 97.8 |
| Laikipia | 97.4 | |
| Makueni | 96.6 | |
| Siaya | 96.5 | |
| Kirinyaga | 96.3 | |
| Elgeyo Marakwet | 95.6 | |
| Nakuru | 95.6 | |
| Embu | 95.5 | |
| Vihiga | 95.2 | |
| Baringo | 95.1 | |
| Uasin Gishu | 95.0 | |
| Nandi | 94.9 | |
| Kisumu | 94.5 | |
| Machakos | 94.2 | |
| Kericho | 94.1 | |
| Bungoma | 93.6 | |
| Taita Taveta | 93.1 | |
| Mombasa | 92.7 | |
| Homa Bay | 92.5 | |
| Wajir | 91.7 | |
| Kitui | 91.5 | |
| Kakamega | 90.5 | |
| Isiolo | 88.0 | |
| Trans Nzoia | 87.7 | |
| Lamu | 87.3 | |
| Busia | 81.3 | |
| Kilifi | 79.6 | |
| Kwale | 78.2 | |
| Kajiado | 77.1 | |
| Narok | 76.4 | |
| West Pokot | 73.0 | |
| Tana River | 60.9 | |
| Garissa | 52.1 |