| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 12 |
0.4%
|
| 2 | 12 years old | 388 |
12.9%
|
| 3 | 13 years old | 620 |
20.6%
|
| 4 | 14 years old | 635 |
21.1%
|
| 5 | 15 years old | 549 |
18.2%
|
| 6 | 16 years old | 447 |
14.8%
|
| 7 | 17 years old | 288 |
9.6%
|
| 8 | 18 years or older | 74 |
2.5%
|
| Sysmiss | 28 |