| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2778 |
93.3%
|
| 1 | Several days | 125 |
4.2%
|
| 2 | More than half the days | 35 |
1.2%
|
| 3 | Nearly every day | 41 |
1.4%
|
| Sysmiss | 4042 |