| 2006 | |
|---|---|
| Nairobi | 25.6 |
| Machakos | 8.0 |
| Kajiado | 6.0 |
| Nyeri | 3.8 |
| Kiambu | 3.4 |
| Uasin Gishu | 3.4 |
| Tana River | 2.4 |
| Meru | 2.3 |
| Muranga | 2.2 |
| Kirinyaga | 2.0 |
| Nakuru | 1.9 |
| Nyandarua | 1.8 |
| Bungoma | 1.5 |
| Narok | 1.4 |
| Marsabit | 1.2 |
| Mombasa | 1.1 |
| Makueni | 1.1 |
| Nyamira | 1.0 |
| Migori | 0.9 |
| Baringo | 0.9 |
| Kisumu | 0.7 |
| Siaya | 0.7 |
| Samburu | 0.7 |
| Kisii | 0.6 |
| Elgeyo Marakwet | 0.6 |
| Kwale | 0.3 |
| Garissa | 0.3 |
| Wajir | 0.3 |
| Trans Nzoia | 0.3 |
| Busia | 0.3 |
| Embu | 0.2 |
| Kilifi | 0.0 |
| Lamu | 0.0 |
| Taita Taveta | 0.0 |
| Isiolo | 0.0 |
| Kitui | 0.0 |
| Tharaka Nithi | 0.0 |
| Mandera | 0.0 |
| Homa Bay | 0.0 |
| Bomet | 0.0 |
| Kericho | 0.0 |
| Laikipia | 0.0 |
| Nandi | 0.0 |
| Turkana | 0.0 |
| West Pokot | 0.0 |
| Kakamega | 0.0 |
| Vihiga | 0.0 |