| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 240 |
12.8%
|
| 2 | 12 years old | 371 |
19.8%
|
| 3 | 13 years old | 373 |
19.9%
|
| 4 | 14 years old | 386 |
20.6%
|
| 5 | 15 years old | 264 |
14.1%
|
| 6 | 16 years old | 168 |
9%
|
| 7 | 17 years old or older | 73 |
3.9%
|
| Sysmiss | 5 |