| Value | Category | Cases | |
|---|---|---|---|
| 1 | 18-21 | 5 |
11.1%
|
| 2 | 22-35 | 16 |
35.6%
|
| 3 | 36-59 | 23 |
51.1%
|
| 4 | over60 | 1 |
2.2%
|
| Missing value | 229 |