| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 126 |
6.4%
|
| 2 | 12 years old | 363 |
18.6%
|
| 3 | 13 years old | 484 |
24.8%
|
| 4 | 14 years old | 448 |
22.9%
|
| 5 | 15 years old | 311 |
15.9%
|
| 6 | 16 years old | 167 |
8.5%
|
| 7 | 17 years old or older | 56 |
2.9%
|
| Sysmiss | 73 |