| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3200 |
96.9%
|
| 1 | Several days | 71 |
2.2%
|
| 2 | More than half the days | 12 |
0.4%
|
| 3 | Nearly every day | 18 |
0.5%
|
| Sysmiss | 3729 |