| Value | Category | Cases | |
|---|---|---|---|
| 1 | No never | 3418 |
35.3%
|
| 2 | Not more than usual | 3838 |
39.7%
|
| 3 | More than usual | 1971 |
20.4%
|
| 4 | Much more than usual | 447 |
4.6%
|
| Sysmiss | 1 |