| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 38 |
2.1%
|
| 2 | 13 years old | 280 |
15.3%
|
| 3 | 14 years old | 492 |
26.8%
|
| 4 | 15 years old | 524 |
28.6%
|
| 5 | 16 years old | 280 |
15.3%
|
| 6 | 17 years old | 157 |
8.6%
|
| 7 | 18 years old | 45 |
2.5%
|
| 8 | 19 years old or older | 17 |
0.9%
|
| Sysmiss | 2 |