| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 26 |
2.3%
|
| 2 | 13 years old | 198 |
17.8%
|
| 3 | 14 years old | 342 |
30.8%
|
| 4 | 15 years old | 333 |
30%
|
| 5 | 16 years old | 144 |
13%
|
| 6 | 17 years old or older | 68 |
6.1%
|
| Sysmiss | 5 |