| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 137 |
3.3%
|
| 2 | 12 years old | 606 |
14.7%
|
| 3 | 13 years old | 848 |
20.6%
|
| 4 | 14 years old | 741 |
18%
|
| 5 | 15 years old | 703 |
17.1%
|
| 6 | 16 years old | 652 |
15.8%
|
| 7 | 17 years old or older | 432 |
10.5%
|
| Sysmiss | 9 |