| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 539 |
44.9%
|
| 1 | Just once or twice | 130 |
10.8%
|
| 2 | Several times | 322 |
26.8%
|
| 3 | Many times | 150 |
12.5%
|
| 4 | Always | 57 |
4.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.2%
|