| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 87 |
3.8%
|
| 2 | 13 years old | 386 |
16.7%
|
| 3 | 14 years old | 451 |
19.6%
|
| 4 | 15 years old | 576 |
25%
|
| 5 | 16 years old | 439 |
19%
|
| 6 | 17 years old | 286 |
12.4%
|
| 7 | 18 years old | 67 |
2.9%
|
| 8 | 19 years old or older | 13 |
0.6%
|
| Sysmiss | 2 |