| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 1125 |
91.5%
|
| 1 | Several days | 72 |
5.9%
|
| 2 | More than half the days | 30 |
2.4%
|
| 3 | Nearly every day | 1 |
0.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 1 |
0.1%
|
| Sysmiss | 27 |