| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 61 |
2.4%
|
| 2 | 12 years old | 207 |
8.2%
|
| 3 | 13 years old | 558 |
22.2%
|
| 4 | 14 years old | 616 |
24.5%
|
| 5 | 15 years old | 623 |
24.8%
|
| 6 | 16 years old | 319 |
12.7%
|
| 7 | 17 years old or older | 133 |
5.3%
|
| Sysmiss | 47 |