| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 14 |
0.7%
|
| 2 | 12 years old | 271 |
12.9%
|
| 3 | 13 years old | 667 |
31.7%
|
| 4 | 14 years old | 639 |
30.4%
|
| 5 | 15 years old | 410 |
19.5%
|
| 6 | 16 years old | 75 |
3.6%
|
| 7 | 17 years old or older | 26 |
1.2%
|
| Sysmiss | 7 |