| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 144 |
6.5%
|
| 2 | 12 years old | 267 |
12%
|
| 3 | 13 years old | 595 |
26.8%
|
| 4 | 14 years old | 631 |
28.4%
|
| 5 | 15 years old | 373 |
16.8%
|
| 6 | 16 years old | 145 |
6.5%
|
| 7 | 17 years old or older | 65 |
2.9%
|
| Sysmiss | 36 |