| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2818 |
56.3%
|
| 1 | Several Days | 1628 |
32.5%
|
| 2 | More than half the days | 393 |
7.8%
|
| 3 | Nearly every day | 143 |
2.9%
|
| 99 | Refused | 25 |
0.5%
|