| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3338 |
93.6%
|
| 1 | Several days | 196 |
5.5%
|
| 2 | More than half the days | 20 |
0.6%
|
| 3 | Nearly every day | 6 |
0.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 6 |
0.2%
|
| Sysmiss | 53 |