| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 90 |
5.8%
|
| 2 | 12 years old | 157 |
10.1%
|
| 3 | 13 years old | 412 |
26.4%
|
| 4 | 14 years old | 342 |
21.9%
|
| 5 | 15 years old | 318 |
20.4%
|
| 6 | 16 years old | 182 |
11.7%
|
| 7 | 17 years old or older | 60 |
3.8%
|
| Sysmiss | 46 |