| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 30704 |
63.9%
|
| 1 | a few times | 5692 |
11.8%
|
| 2 | often | 4174 |
8.7%
|
| 8 | refused | 112 |
0.2%
|
| 9 | don’t know | 7402 |
15.4%
|