| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3084 |
93.4%
|
| 1 | Several days | 138 |
4.2%
|
| 2 | More than half the days | 37 |
1.1%
|
| 3 | Nearly every day | 43 |
1.3%
|
| Sysmiss | 3728 |