| Value | Category | Cases | |
|---|---|---|---|
| 1 | Don’t know what it is | 28293 |
5.6%
|
| 2 | Never or almost never | 124162 |
24.6%
|
| 3 | Several times a month | 162412 |
32.2%
|
| 4 | Several times a week | 131576 |
26.1%
|
| 5 | Several times a day | 57526 |
11.4%
|
| 7 | N/A | 4154 | |
| 8 | Invalid | 1145 | |
| 9 | Miss | 6690 |