| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 76 |
2.3%
|
| 2 | 12 years old | 146 |
4.4%
|
| 3 | 13 years old | 515 |
15.6%
|
| 4 | 14 years old | 836 |
25.3%
|
| 5 | 15 years old | 912 |
27.7%
|
| 6 | 16 years old | 553 |
16.8%
|
| 7 | 17 years old or older | 260 |
7.9%
|
| Sysmiss | 75 |