| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old or younger | 15 |
0.4%
|
| 2 | 13 years old | 179 |
4.9%
|
| 3 | 14 years old | 672 |
18.3%
|
| 4 | 15 years old | 788 |
21.4%
|
| 5 | 16 years old | 842 |
22.9%
|
| 6 | 17 years old | 646 |
17.6%
|
| 7 | 18 years old or older | 534 |
14.5%
|
| Sysmiss | 21 |