| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 251 |
2.3%
|
| 2 | 12 years old | 1796 |
16.1%
|
| 3 | 13 years old | 2502 |
22.5%
|
| 4 | 14 years old | 2565 |
23.1%
|
| 5 | 15 years old | 1943 |
17.5%
|
| 6 | 16 years old | 1113 |
10%
|
| 7 | 17 years old | 776 |
7%
|
| 8 | 18 years old or older | 178 |
1.6%
|
| Sysmiss | 18 |