| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 29 |
0.8%
|
| 2 | 12 years old | 171 |
4.5%
|
| 3 | 13 years old | 911 |
24.2%
|
| 4 | 14 years old | 1196 |
31.8%
|
| 5 | 15 years old | 690 |
18.3%
|
| 6 | 16 years old | 355 |
9.4%
|
| 7 | 17 years old | 254 |
6.7%
|
| 8 | 18 years or older | 157 |
4.2%
|
| Sysmiss | 33 |