| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 199 |
9.6%
|
| 2 | 13 years old | 529 |
25.4%
|
| 3 | 14 years old | 585 |
28.1%
|
| 4 | 15 years old | 433 |
20.8%
|
| 5 | 16 years old | 205 |
9.9%
|
| 6 | 17 years old | 113 |
5.4%
|
| 7 | 18 years old | 12 |
0.6%
|
| 8 | 19 years old or older | 3 |
0.1%
|