| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3165 |
88.8%
|
| 1 | Several days | 325 |
9.1%
|
| 2 | More than half the days | 56 |
1.6%
|
| 3 | Nearly every day | 17 |
0.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 3 |
0.1%
|
| Sysmiss | 53 |