| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 11 |
0.5%
|
| 2 | 12 years old | 22 |
1%
|
| 3 | 13 years old | 409 |
18.1%
|
| 4 | 14 years old | 550 |
24.3%
|
| 5 | 15 years old | 579 |
25.6%
|
| 6 | 16 years old | 423 |
18.7%
|
| 7 | 17 years old or older | 267 |
11.8%
|
| Sysmiss | 7 |