| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 103 |
4.6%
|
| 2 | 12 years old | 258 |
11.6%
|
| 3 | 13 years old | 623 |
28.1%
|
| 4 | 14 years old | 692 |
31.2%
|
| 5 | 15 years old | 397 |
17.9%
|
| 6 | 16 years old | 131 |
5.9%
|
| 7 | 17 years old or older | 17 |
0.8%
|
| Sysmiss | 11 |