| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 131 |
4%
|
| 2 | 13 years old | 956 |
29.3%
|
| 3 | 14 years old | 991 |
30.3%
|
| 4 | 15 years old | 1074 |
32.9%
|
| 5 | 16 years old and older | 115 |
3.5%
|
| Sysmiss | 36 |