| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 73 |
1.1%
|
| 2 | 12 years old | 920 |
13.8%
|
| 3 | 13 years old | 1914 |
28.7%
|
| 4 | 14 years old | 2216 |
33.2%
|
| 5 | 15 years old | 1235 |
18.5%
|
| 6 | 16 years old | 240 |
3.6%
|
| 7 | 17 years old or older | 75 |
1.1%
|
| Sysmiss | 79 |