| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3179 |
96.3%
|
| 1 | Several days | 89 |
2.7%
|
| 2 | More than half the days | 13 |
0.4%
|
| 3 | Nearly every day | 20 |
0.6%
|
| Sysmiss | 3729 |