| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 46 |
2.2%
|
| 2 | 12 years old | 260 |
12.3%
|
| 3 | 13 years old | 481 |
22.7%
|
| 4 | 14 years old | 496 |
23.4%
|
| 5 | 15 years old | 389 |
18.4%
|
| 6 | 16 years old | 231 |
10.9%
|
| 7 | 17 years old or older | 215 |
10.2%
|
| Sysmiss | 37 |