| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 367 |
22.9%
|
| 1 | Just once or twice | 406 |
25.4%
|
| 2 | Several times | 501 |
31.3%
|
| 3 | Many times | 244 |
15.3%
|
| 4 | Always | 78 |
4.9%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 4 |
0.3%
|