| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 18 |
1.4%
|
| 2 | 13 years old | 115 |
8.9%
|
| 3 | 14 years old | 352 |
27.1%
|
| 4 | 15 years old | 321 |
24.7%
|
| 5 | 16 years old | 261 |
20.1%
|
| 6 | 17 years old or older | 231 |
17.8%
|
| Sysmiss | 10 |