| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 423 |
35.1%
|
| 1 | Just once or twice | 136 |
11.3%
|
| 2 | Several times | 312 |
25.9%
|
| 3 | Many times | 221 |
18.4%
|
| 4 | Always | 103 |
8.6%
|
| 8 | Refused | 3 |
0.2%
|
| 9 | Don't know | 6 |
0.5%
|