| Value | Category | Cases | |
|---|---|---|---|
| -97 | (Don't read) Refused to answer | 1 |
0.1%
|
| 1 | Not at all or less than one day | 111 |
15.2%
|
| 2 | Several days | 179 |
24.5%
|
| 3 | More than half a day to a day | 34 |
4.6%
|
| 4 | Nearly everyday | 407 |
55.6%
|