| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 47 |
1.3%
|
| 2 | 12 years old | 126 |
3.6%
|
| 3 | 13 years old | 697 |
19.7%
|
| 4 | 14 years old | 1001 |
28.2%
|
| 5 | 15 years old | 980 |
27.7%
|
| 6 | 16 years old or older | 693 |
19.6%
|
| Sysmiss | 152 |