| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3230 |
90.6%
|
| 1 | Several days | 284 |
8%
|
| 2 | More than half the days | 45 |
1.3%
|
| 3 | Nearly every day | 5 |
0.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 2 |
0.1%
|
| Sysmiss | 53 |