| Effective | % |
21 - 25 | 3 | 4.11 |
26 - 30 | 24 | 32.88 |
31 - 35 | 20 | 27.40 |
36 - 40 | 15 | 20.55 |
41 - 45 | 11 | 15.07 |
Total | 73 | 100 |