| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3046 |
92.2%
|
| 1 | Several days | 178 |
5.4%
|
| 2 | More than half the days | 31 |
0.9%
|
| 3 | Nearly every day | 49 |
1.5%
|
| Sysmiss | 3726 |