| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 4 |
0.2%
|
| 2 | 12 years old | 2 |
0.1%
|
| 3 | 13 years old | 452 |
17.8%
|
| 4 | 14 years old | 602 |
23.7%
|
| 5 | 15 years old | 514 |
20.2%
|
| 6 | 16 years old | 492 |
19.3%
|
| 7 | 17 years old | 436 |
17.1%
|
| 8 | 18 years old or older | 43 |
1.7%
|
| Sysmiss | 17 |