| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all. | 3076 |
92.8%
|
| 1 | Several days | 173 |
5.2%
|
| 2 | More than half the days | 24 |
0.7%
|
| 3 | Nearly every day | 42 |
1.3%
|
| Sysmiss | 2673 |