| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 12 |
0.9%
|
| 2 | 12 years old | 47 |
3.4%
|
| 3 | 13 years old | 266 |
19.2%
|
| 4 | 14 years old | 379 |
27.3%
|
| 5 | 15 years old | 479 |
34.6%
|
| 6 | 16 years old | 88 |
6.3%
|
| 7 | 17 years old or older | 115 |
8.3%
|
| Sysmiss | 4 |