| Period of work in Kenya (years) | Frequency | Percentage |
| <5 | 28 | 10.2 |
| 5 - 10 | 88 | 32.0 |
| 11 - 15 | 55 | 20.0 |
| 16 - 20 | 48 | 17.5 |
| 21 - 25 | 21 | 7.6 |
| 26 - 30 | 13 | 4.7 |
| 31 - 35 | 7 | 2.5 |
| 36 - 40 | 4 | 1.5 |
| 41 - 45 | 4 | 1.5 |
| 46 - 50 | 4 | 1.5 |
| 56 - 60 | 2 | 0.7 |
| >61 | 1 | 0.4 |
| Total | 275 | 100 |