| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2540 |
85.2%
|
| 1 | Several days | 312 |
10.5%
|
| 2 | More than half the days | 70 |
2.3%
|
| 3 | Nearly every day | 59 |
2%
|
| Sysmiss | 4040 |