| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 862 |
71.8%
|
| 1 | Just once or twice | 54 |
4.5%
|
| 2 | Several times | 134 |
11.2%
|
| 3 | Many times | 89 |
7.4%
|
| 4 | Always | 60 |
5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|