| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 109 |
1.7%
|
| 2 | 12 years old | 207 |
3.3%
|
| 3 | 13 years old | 1201 |
19.2%
|
| 4 | 14 years old | 2263 |
36.2%
|
| 5 | 15 years old | 1657 |
26.5%
|
| 6 | 16 years old | 757 |
12.1%
|
| 7 | 17 years old or older | 53 |
0.8%
|
| Sysmiss | 159 |