| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 20144 |
37.7%
|
| 1 | occasionally | 23561 |
44.1%
|
| 2 | frequently | 9538 |
17.8%
|
| 8 | refused | 40 |
0.1%
|
| 9 | don't know | 161 |
0.3%
|