| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 144 |
11.1%
|
| 2 | 12 years old | 338 |
26.1%
|
| 3 | 13 years old | 350 |
27%
|
| 4 | 14 years old | 272 |
21%
|
| 5 | 15 years old | 94 |
7.3%
|
| 6 | 16 years old | 40 |
3.1%
|
| 7 | 17 years old or older | 57 |
4.4%
|
| Sysmiss | 19 |