| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 341 |
2.4%
|
| 2 | 12 years old | 2407 |
17.3%
|
| 3 | 13 years old | 4605 |
33.1%
|
| 4 | 14 years old | 4751 |
34.1%
|
| 5 | 15 years old | 1600 |
11.5%
|
| 6 | 16 years old | 187 |
1.3%
|
| 7 | 17 years old | 42 |
0.3%
|
| 8 | 18 and over | 0 |
0%
|
| Sysmiss | 179 |