| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 124 |
2.1%
|
| 2 | 12 years old | 1371 |
22.9%
|
| 3 | 13 years old | 2247 |
37.6%
|
| 4 | 14 years old | 1512 |
25.3%
|
| 5 | 15 years old | 558 |
9.3%
|
| 6 | 16 years old | 134 |
2.2%
|
| 7 | 17 years old or older | 38 |
0.6%
|
| Sysmiss | 2 |