| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 38 |
1.9%
|
| 2 | 12 years old | 516 |
26.4%
|
| 3 | 13 years old | 642 |
32.8%
|
| 4 | 14 years old | 560 |
28.6%
|
| 5 | 15 years old | 174 |
8.9%
|
| 6 | 16 years old | 19 |
1%
|
| 7 | 17 years old or older | 6 |
0.3%
|
| Sysmiss | 27 |