| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 31 |
3.4%
|
| 2 | 13 years old | 106 |
11.6%
|
| 3 | 14 years old | 137 |
15%
|
| 4 | 15 years old | 203 |
22.2%
|
| 5 | 16 years old | 116 |
12.7%
|
| 6 | 17 years old or older | 320 |
35%
|
| Sysmiss | 18 |