| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 60 |
1.2%
|
| 2 | 12 years old | 612 |
12.1%
|
| 3 | 13 years old | 1254 |
24.7%
|
| 4 | 14 years old | 1203 |
23.7%
|
| 5 | 15 years old | 1133 |
22.4%
|
| 6 | 16 years old | 632 |
12.5%
|
| 7 | 17 years old or older | 175 |
3.5%
|
| Sysmiss | 84 |