| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 47 |
2.4%
|
| 2 | 12 years old | 98 |
5.1%
|
| 3 | 13 years old | 237 |
12.3%
|
| 4 | 14 years old | 368 |
19.1%
|
| 5 | 15 years old | 355 |
18.5%
|
| 6 | 16 years old | 356 |
18.5%
|
| 7 | 17 years old | 288 |
15%
|
| 8 | 18 years old or older | 175 |
9.1%
|
| Sysmiss | 31 |