| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 11 |
0.3%
|
| 2 | 12 years old | 186 |
5.8%
|
| 3 | 13 years old | 533 |
16.6%
|
| 4 | 14 years old | 558 |
17.4%
|
| 5 | 15 years old | 625 |
19.5%
|
| 6 | 16 years old | 529 |
16.5%
|
| 7 | 17 years old | 440 |
13.7%
|
| 8 | 18 years old or older | 328 |
10.2%
|
| Sysmiss | 6 |