| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 365 |
30.5%
|
| 1 | Just once or twice | 250 |
20.9%
|
| 2 | Several times | 292 |
24.4%
|
| 3 | Many times | 203 |
16.9%
|
| 4 | Always | 86 |
7.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.2%
|