| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 306 |
25.5%
|
| 1 | Just once or twice | 277 |
23.1%
|
| 2 | Several times | 306 |
25.5%
|
| 3 | Many times | 215 |
17.9%
|
| 4 | Always | 91 |
7.6%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 4 |
0.3%
|