| Age in years | Gender | Total (%) | |
| Male N (%) | Female N (%) | ||
| 6 | 74 (44.6) | 92 (55.4) | 166 (100.0) |
| 7 | 62 (52.5) | 56 (47.5) | 118 (100.0) |
| 8 | 56 (42.4) | 76 (57.6) | 132 (100.0) |
| 9 | 100 (50.0) | 100 (50.0) | 200 (100.0) |
| 10 | 101 (43.2) | 133 (56.8) | 234 (100.0) |
| 11 | 82 (56.6) | 63 (43.4) | 145 (100.0) |
| 12 | 86 (47.3) | 96 (52.7) | 182 (100.0) |
| 13 | 63 (54.8) | 52 (45.2) | 115 (100.0) |
| 14 | 24 (55.8) | 19 (44.2) | 43 (100.0) |