| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 131 |
7.4%
|
| 2 | 12 years old | 260 |
14.7%
|
| 3 | 13 years old | 355 |
20.1%
|
| 4 | 14 years old | 361 |
20.4%
|
| 5 | 15 years old | 352 |
19.9%
|
| 6 | 16 years old | 210 |
11.9%
|
| 7 | 17 years old or older | 99 |
5.6%
|
| Sysmiss | 27 |