| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 98 |
4.5%
|
| 2 | 12 years old | 225 |
10.4%
|
| 3 | 13 years old | 538 |
24.9%
|
| 4 | 14 years old | 610 |
28.2%
|
| 5 | 15 years old | 468 |
21.6%
|
| 6 | 16 years old | 167 |
7.7%
|
| 7 | 17 years old or older | 57 |
2.6%
|
| Sysmiss | 34 |