| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 570 |
47.5%
|
| 1 | Once or twice | 179 |
14.9%
|
| 2 | Several times | 227 |
18.9%
|
| 3 | Many times | 223 |
18.6%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|