| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 90 |
1.7%
|
| 2 | 12 years old | 187 |
3.6%
|
| 3 | 13 years old | 1075 |
20.5%
|
| 4 | 14 years old | 1604 |
30.6%
|
| 5 | 15 years old | 1473 |
28.1%
|
| 6 | 16 years old | 651 |
12.4%
|
| 7 | 17 years old or older | 164 |
3.1%
|
| Sysmiss | 26 |