| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 33 |
0.6%
|
| 2 | 12 years old | 786 |
13.9%
|
| 3 | 13 years old | 1490 |
26.3%
|
| 4 | 14 years old | 1322 |
23.3%
|
| 5 | 15 years old | 1265 |
22.3%
|
| 6 | 16 years old | 646 |
11.4%
|
| 7 | 17 years old or older | 129 |
2.3%
|
| Sysmiss | 27 |