| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 101 |
4.8%
|
| 2 | 12 years old | 497 |
23.5%
|
| 3 | 13 years old | 554 |
26.2%
|
| 4 | 14 years old | 577 |
27.3%
|
| 5 | 15 years old | 221 |
10.4%
|
| 6 | 16 years old | 124 |
5.9%
|
| 7 | 17 years old or older | 41 |
1.9%
|
| Sysmiss | 40 |