| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 68 |
1.8%
|
| 2 | 12 years old | 662 |
17.6%
|
| 3 | 13 years old | 912 |
24.3%
|
| 4 | 14 years old | 982 |
26.1%
|
| 5 | 15 years old | 585 |
15.6%
|
| 6 | 16 years old | 301 |
8%
|
| 7 | 17 years old | 229 |
6.1%
|
| 8 | 18 years old or older | 20 |
0.5%
|
| Sysmiss | 1 |