| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2929 |
88.6%
|
| 1 | Several days | 243 |
7.4%
|
| 2 | More than half the days | 50 |
1.5%
|
| 3 | Nearly every day | 83 |
2.5%
|
| Sysmiss | 3725 |