| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all. | 2990 |
90.1%
|
| 1 | Several days | 268 |
8.1%
|
| 2 | More than half the days | 12 |
0.4%
|
| 3 | Nearly every day | 48 |
1.4%
|
| Sysmiss | 2670 |