| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 17842 |
37.1%
|
| 1 | occasionally | 20872 |
43.4%
|
| 2 | frequently | 9164 |
19.1%
|
| 8 | refused | 37 |
0.1%
|
| 9 | don't know | 169 |
0.4%
|