| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 66 |
5.5%
|
| 1 | Just once or twice | 83 |
6.9%
|
| 2 | Several times | 397 |
33.1%
|
| 3 | Many times | 349 |
29.1%
|
| 4 | Always | 304 |
25.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|