| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 27 |
0.8%
|
| 2 | 12 years old | 7 |
0.2%
|
| 3 | 13 years old | 336 |
10.2%
|
| 4 | 14 years old | 953 |
28.9%
|
| 5 | 15 years old | 845 |
25.6%
|
| 6 | 16 years old | 579 |
17.5%
|
| 7 | 17 years old | 373 |
11.3%
|
| 8 | 18 years or older | 182 |
5.5%
|
| Sysmiss | 9 |