| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 113 |
1.7%
|
| 2 | 12 years old | 493 |
7.6%
|
| 3 | 13 years old | 1174 |
18.1%
|
| 4 | 14 years old | 1504 |
23.2%
|
| 5 | 15 years old | 1445 |
22.3%
|
| 6 | 16 years old | 1111 |
17.1%
|
| 7 | 17 years old | 513 |
7.9%
|
| 8 | 18 years old or older | 128 |
2%
|
| Sysmiss | 48 |