| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 37 |
2.2%
|
| 2 | 12 years old | 267 |
15.6%
|
| 3 | 13 years old | 491 |
28.6%
|
| 4 | 14 years old | 449 |
26.2%
|
| 5 | 15 years old | 316 |
18.4%
|
| 6 | 16 years old | 132 |
7.7%
|
| 7 | 17 years old or older | 25 |
1.5%
|
| Sysmiss | 25 |