| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 128 |
3%
|
| 2 | 12 years old | 497 |
11.6%
|
| 3 | 13 years old | 692 |
16.2%
|
| 4 | 14 years old | 889 |
20.8%
|
| 5 | 15 years old | 829 |
19.4%
|
| 6 | 16 years old | 617 |
14.4%
|
| 7 | 17 years old | 461 |
10.8%
|
| 8 | 18 years or older | 160 |
3.7%
|
| Sysmiss | 26 |