Age ranges (years) | Percentage (%) | Mean ± SD (years) |
15 - 19 | 11 | 18 ± 1.4 |
20 - 24 | 19 | 23 ± 2.4 |
25 - 29 | 16 | 27 ± 2.7 |
30 - 34 | 14 | 33 ± 2.3 |
35 - 39 | 34 | 35 ± 3.1 |
40 - 45 | 6 | 43 ± 1.4 |
Total | 100% | 29.8 ± 2.2 years |