| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 52 |
1.7%
|
| 2 | 12 years old | 313 |
10.1%
|
| 3 | 13 years old | 893 |
28.9%
|
| 4 | 14 years old | 669 |
21.7%
|
| 5 | 15 years old | 605 |
19.6%
|
| 6 | 16 years old | 460 |
14.9%
|
| 7 | 17 years old or older | 98 |
3.2%
|
| Sysmiss | 20 |