| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 112 |
4%
|
| 2 | 12 years old | 435 |
15.4%
|
| 3 | 13 years old | 473 |
16.7%
|
| 4 | 14 years old | 588 |
20.8%
|
| 5 | 15 years old | 540 |
19.1%
|
| 6 | 16 years old | 400 |
14.1%
|
| 7 | 17 years old | 228 |
8.1%
|
| 8 | 18 years old or older | 52 |
1.8%
|
| Sysmiss | 8 |