| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 58 |
2.5%
|
| 2 | 12 years old | 65 |
2.8%
|
| 3 | 13 years old | 324 |
14.1%
|
| 4 | 14 years old | 624 |
27.2%
|
| 5 | 15 years old | 617 |
26.9%
|
| 6 | 16 years old | 452 |
19.7%
|
| 7 | 17 years old or older | 150 |
6.6%
|
| Sysmiss | 23 |