| Province | Mean | Standard Deviation | Mean | Standard Deviation | Mean | Standard Deviation |
| 2000 | 2004 | 2012 | ||||
| Central | 1,030,890 | 660,276.2 | 769,811.8 | 296,505.6 | 480,274.6 | 220,284.8 |
| Coast | 939,129.5 | 752,259.7 | 737,702.0 | 356,629.7 | 703,215.3 | 361,027.2 |
| Eastern | 569,264.0 | 287,237.9 | 530,759.0 | 256,185.5 | 413,787.2 | 217,930.1 |
| Nairobi | 1,205,449 | 364,168.5 | 1,216,258.0 | 398,010.6 | 1,282,608 | 552,954.5 |
| North Eastern | 826,018.7 | 478,641.5 | 1,058,135.0 | 643,337.2 | 171,800.5 | 32,021.6 |
| Nyanza | 543,366.1 | 339,848.0 | 518,805.4 | 405,103.6 | 484,393.8 | 254,402.5 |
| Rift valley | 663,115.8 | 264,743.3 | 650,955.2 | 273,526.7 | 610,123.5 | 337,802.0 |
| Western | 867,895.6 | 556,341.1 | 7,080,391.0 | 342,887.2 | 723,979.5 | 357,703.4 |
| Total Mean | 5,614,238 |
| 12,562,818 |
| 4,870,182 |
|