| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 76 |
2.2%
|
| 2 | 12 years old | 321 |
9.3%
|
| 3 | 13 years old | 580 |
16.8%
|
| 4 | 14 years old | 740 |
21.5%
|
| 5 | 15 years old | 748 |
21.7%
|
| 6 | 16 years old | 587 |
17%
|
| 7 | 17 years old or older | 395 |
11.5%
|
| Sysmiss | 11 |