| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 39 |
2.3%
|
| 2 | 12 years old | 75 |
4.3%
|
| 3 | 13 years old | 160 |
9.3%
|
| 4 | 14 years old | 256 |
14.8%
|
| 5 | 15 years old | 381 |
22%
|
| 6 | 16 years old | 343 |
19.8%
|
| 7 | 17 years old or older | 474 |
27.4%
|
| Sysmiss | 60 |