| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 54 |
3.9%
|
| 2 | 12 years old | 155 |
11.1%
|
| 3 | 13 years old | 400 |
28.7%
|
| 4 | 14 years old | 407 |
29.2%
|
| 5 | 15 years old | 311 |
22.3%
|
| 6 | 16 years old | 49 |
3.5%
|
| 7 | 17 years old or older | 16 |
1.1%
|
| Sysmiss | 64 |