| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 8 |
0.5%
|
| 2 | 12 years old | 12 |
0.7%
|
| 3 | 13 years old | 116 |
7.1%
|
| 4 | 14 years old | 637 |
39.2%
|
| 5 | 15 years old | 578 |
35.6%
|
| 6 | 16 years old | 240 |
14.8%
|
| 7 | 17 years old or older | 34 |
2.1%
|
| Sysmiss | 4 |