| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 43 |
3.6%
|
| 1 | Just once or twice | 35 |
2.9%
|
| 2 | Several times | 210 |
17.5%
|
| 3 | Many times | 582 |
48.5%
|
| 4 | Always | 330 |
27.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|