menarche | Effective | Percentage |
11 | 1 | 1.2 |
12 | 8 | 9.2 |
13 | 21 | 24.1 |
14 | 33 | 37.9 |
15 | 15 | 17.2 |
16 | 6 | 6.9 |
17 | 2 | 2.3 |
18 | 1 | 1.2 |
Total | 87 | 100 |