| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 99 |
4.3%
|
| 2 | 12 years old | 76 |
3.3%
|
| 3 | 13 years old | 159 |
6.9%
|
| 4 | 14 years old | 400 |
17.5%
|
| 5 | 15 years old | 608 |
26.6%
|
| 6 | 16 years old | 685 |
29.9%
|
| 7 | 17 years old or older | 262 |
11.4%
|
| Sysmiss | 18 |