| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 44 |
2.9%
|
| 2 | 12 years old | 250 |
16.5%
|
| 3 | 13 years old | 359 |
23.8%
|
| 4 | 14 years old | 310 |
20.5%
|
| 5 | 15 years old | 279 |
18.5%
|
| 6 | 16 years old | 197 |
13%
|
| 7 | 17 years old or older | 72 |
4.8%
|
| Sysmiss | 56 |