| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 587 |
71.8%
|
| 1 | Several days | 190 |
23.3%
|
| 2 | 30 |
3.7%
|
|
| 3 | More than half of the days | 9 |
1.1%
|
| 4 | Nearly every day | 1 |
0.1%
|
| Sysmiss | 4 |