| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 140 |
5.1%
|
| 2 | 12 years old | 644 |
23.4%
|
| 3 | 13 years old | 771 |
28.1%
|
| 4 | 14 years old | 760 |
27.7%
|
| 5 | 15 years old | 339 |
12.3%
|
| 6 | 16 years old | 73 |
2.7%
|
| 7 | 17 years old or older | 21 |
0.8%
|
| Sysmiss | 54 |