Year | Number | Percentage |
0 - 15 | 7 | 23.33 |
16 - 30 | 10 | 30 |
31 - 45 | 4 | 13.33 |
46 - 60 | 5 | 16.67 |
61 - 75 | 4 | 13.33 |
Total | 30 | 100.00 |