| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 127 |
3.4%
|
| 2 | 12 years old | 592 |
15.8%
|
| 3 | 13 years old | 810 |
21.6%
|
| 4 | 14 years old | 804 |
21.5%
|
| 5 | 15 years old | 619 |
16.5%
|
| 6 | 16 years old | 411 |
11%
|
| 7 | 17 years old | 269 |
7.2%
|
| 8 | 18 years old or older | 114 |
3%
|
| Sysmiss | 5 |