| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 33 |
1.9%
|
| 2 | 12 years old | 160 |
9.2%
|
| 3 | 13 years old | 453 |
26.2%
|
| 4 | 14 years old | 639 |
36.9%
|
| 5 | 15 years old | 325 |
18.8%
|
| 6 | 16 years old | 101 |
5.8%
|
| 7 | 17 years old or older | 21 |
1.2%
|
| Sysmiss | 33 |