| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 122 |
17.8%
|
| 2 | 13 years old | 194 |
28.2%
|
| 3 | 14 years old | 164 |
23.9%
|
| 4 | 15 years old | 135 |
19.7%
|
| 5 | 16 years old | 49 |
7.1%
|
| 6 | 17 years old | 20 |
2.9%
|
| 7 | 18 years old | 3 |
0.4%
|
| 8 | 19 years old or older | 0 |
0%
|