| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 60 |
1.6%
|
| 2 | 12 years old | 427 |
11.2%
|
| 3 | 13 years old | 731 |
19.1%
|
| 4 | 14 years old | 669 |
17.5%
|
| 5 | 15 years old | 566 |
14.8%
|
| 6 | 16 years old | 555 |
14.5%
|
| 7 | 17 years old or older | 821 |
21.4%
|
| Sysmiss | 198 |