| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 40 |
1.2%
|
| 2 | 12 years old | 359 |
10.6%
|
| 3 | 13 years old | 884 |
26.1%
|
| 4 | 14 years old | 885 |
26.2%
|
| 5 | 15 years old | 714 |
21.1%
|
| 6 | 16 years old | 363 |
10.7%
|
| 7 | 17 years old or older | 137 |
4.1%
|
| Sysmiss | 43 |