| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 365 |
15.3%
|
| 1 | Just once or twice | 453 |
19%
|
| 2 | Several times | 594 |
25%
|
| 3 | Many times | 715 |
30.1%
|
| 4 | Always | 247 |
10.4%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 4 |
0.2%
|