| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 75 |
1.7%
|
| 2 | 12 years old | 520 |
11.5%
|
| 3 | 13 years old | 1286 |
28.5%
|
| 4 | 14 years old | 1509 |
33.4%
|
| 5 | 15 years old | 942 |
20.8%
|
| 6 | 16 years old | 154 |
3.4%
|
| 7 | 17 years old or older | 34 |
0.8%
|
| Sysmiss | 115 |