| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 268 |
6.8%
|
| 2 | 12 years old | 311 |
7.9%
|
| 3 | 13 years old | 376 |
9.5%
|
| 4 | 14 years old | 646 |
16.4%
|
| 5 | 15 years old | 747 |
18.9%
|
| 6 | 16 years old | 731 |
18.5%
|
| 7 | 17 years old or older | 864 |
21.9%
|
| Sysmiss | 201 |