| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 57 |
3.3%
|
| 2 | 12 years old | 167 |
9.7%
|
| 3 | 13 years old | 510 |
29.6%
|
| 4 | 14 years old | 528 |
30.7%
|
| 5 | 15 years old | 352 |
20.5%
|
| 6 | 16 years old | 95 |
5.5%
|
| 7 | 17 years old or older | 12 |
0.7%
|
| Sysmiss | 19 |