| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 41 |
1.8%
|
| 2 | 12 years old | 145 |
6.2%
|
| 3 | 13 years old | 633 |
27.1%
|
| 4 | 14 years old | 749 |
32%
|
| 5 | 15 years old | 518 |
22.1%
|
| 6 | 16 years old | 209 |
8.9%
|
| 7 | 17 years old or older | 45 |
1.9%
|
| Sysmiss | 23 |