| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 823 |
34.3%
|
| 1 | Just once or twice | 419 |
17.5%
|
| 2 | Several times | 506 |
21.1%
|
| 3 | Many times | 361 |
15%
|
| 4 | Always | 282 |
11.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 9 |
0.4%
|