| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 7 |
0.4%
|
| 2 | 12 years old | 117 |
6.2%
|
| 3 | 13 years old | 327 |
17.2%
|
| 4 | 14 years old | 419 |
22%
|
| 5 | 15 years old | 436 |
22.9%
|
| 6 | 16 years old | 350 |
18.4%
|
| 7 | 17 years old or older | 245 |
12.9%
|
| Sysmiss | 6 |