| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 13 |
2.6%
|
| 2 | 12 years old | 77 |
15.3%
|
| 3 | 13 years old | 134 |
26.7%
|
| 4 | 14 years old | 136 |
27.1%
|
| 5 | 15 years old | 100 |
19.9%
|
| 6 | 16 years old | 25 |
5%
|
| 7 | 17 years old or older | 17 |
3.4%
|
| Sysmiss | 7 |