| Value | Category | Cases | |
|---|---|---|---|
| 1 | 18-21 | 1 |
2%
|
| 2 | 22-35 | 19 |
38%
|
| 3 | 36-59 | 29 |
58%
|
| 4 | over60 | 1 |
2%
|
| Missing value | 35 |