| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 21 |
0.7%
|
| 2 | 12 years old | 247 |
8.4%
|
| 3 | 13 years old | 621 |
21.1%
|
| 4 | 14 years old | 651 |
22.1%
|
| 5 | 15 years old | 543 |
18.4%
|
| 6 | 16 years old | 424 |
14.4%
|
| 7 | 17 years old | 295 |
10%
|
| 8 | 18 years old or older | 148 |
5%
|
| Sysmiss | 12 |