| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 40 |
1.2%
|
| 2 | 12 years old | 39 |
1.1%
|
| 3 | 13 years old | 358 |
10.4%
|
| 4 | 14 years old | 531 |
15.4%
|
| 5 | 15 years old | 741 |
21.4%
|
| 6 | 16 years old | 760 |
22%
|
| 7 | 17 years old | 731 |
21.2%
|
| 8 | 18 years old or older | 256 |
7.4%
|
| Sysmiss | 12 |