| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 269 |
22.6%
|
| 1 | Just once or twice | 56 |
4.7%
|
| 2 | Several times | 204 |
17.1%
|
| 3 | Many times | 622 |
52.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 40 |
3.4%
|