| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1591 |
66.9%
|
| 1 | Once or twice | 297 |
12.5%
|
| 2 | Several times | 189 |
7.9%
|
| 3 | Many times | 294 |
12.4%
|
| 8 | Refused | 1 |
0%
|
| 9 | Don't know | 6 |
0.3%
|