| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 20 |
0.9%
|
| 2 | 12 years old | 63 |
2.9%
|
| 3 | 13 years old | 288 |
13.5%
|
| 4 | 14 years old | 436 |
20.4%
|
| 5 | 15 years old | 501 |
23.5%
|
| 6 | 16 years old | 485 |
22.7%
|
| 7 | 17 years old | 269 |
12.6%
|
| 8 | 18 years old or older | 74 |
3.5%
|
| Sysmiss | 23 |