| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 252 |
10.5%
|
| 1 | Just once or twice | 410 |
17.1%
|
| 2 | Several times | 690 |
28.8%
|
| 3 | Many times | 627 |
26.1%
|
| 4 | Always | 411 |
17.1%
|
| 8 | Refused | 3 |
0.1%
|
| 9 | Don't know | 7 |
0.3%
|