| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 822 |
51.4%
|
| 1 | Just once or twice | 389 |
24.3%
|
| 2 | Several times | 256 |
16%
|
| 3 | Many times | 82 |
5.1%
|
| 4 | Always | 50 |
3.1%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 0 |
0%
|