| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 106 |
5.9%
|
| 2 | 12 years old | 459 |
25.3%
|
| 3 | 13 years old | 615 |
34%
|
| 4 | 14 years old | 399 |
22%
|
| 5 | 15 years old | 169 |
9.3%
|
| 6 | 16 years old | 50 |
2.8%
|
| 7 | 17 years old or older | 13 |
0.7%
|
| Sysmiss | 77 |