| 2009 | |
|---|---|
| Nairobi | 15.0 |
| Uasin Gishu | 8.4 |
| Kiambu | 7.7 |
| Mombasa | 7.3 |
| Kajiado | 6.0 |
| Tana River | 5.5 |
| Nakuru | 4.8 |
| Nyeri | 4.4 |
| Kisumu | 4.4 |
| Machakos | 3.5 |
| Kericho | 3.3 |
| Embu | 3.2 |
| Taita Taveta | 3.0 |
| Baringo | 3.0 |
| Nandi | 2.8 |
| Kirinyaga | 2.7 |
| Laikipia | 2.6 |
| Muranga | 2.5 |
| Kisii | 2.5 |
| Meru | 2.4 |
| Nyamira | 2.3 |
| Elgeyo Marakwet | 2.2 |
| Makueni | 2.1 |
| Tharaka Nithi | 2.1 |
| Bomet | 2.1 |
| Kakamega | 2.1 |
| Isiolo | 2.0 |
| Kitui | 2.0 |
| Vihiga | 2.0 |
| Trans Nzoia | 1.8 |
| Nyandarua | 1.7 |
| Migori | 1.7 |
| Bungoma | 1.7 |
| Garissa | 1.5 |
| Siaya | 1.5 |
| Turkana | 1.5 |
| Busia | 1.4 |
| Kilifi | 1.3 |
| Marsabit | 1.3 |
| Samburu | 1.3 |
| Narok | 1.2 |
| West Pokot | 1.2 |
| Kwale | 1.1 |
| Lamu | 1.0 |
| Wajir | 0.9 |
| Mandera | 0.6 |