| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 58 |
2.5%
|
| 2 | 12 years old | 278 |
12.2%
|
| 3 | 13 years old | 597 |
26.1%
|
| 4 | 14 years old | 623 |
27.3%
|
| 5 | 15 years old | 431 |
18.9%
|
| 6 | 16 years old | 205 |
9%
|
| 7 | 17 years old or older | 93 |
4.1%
|
| Sysmiss | 54 |