| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 870 |
72.6%
|
| 1 | Just once or twice | 156 |
13%
|
| 2 | Several times | 127 |
10.6%
|
| 3 | Many times | 22 |
1.8%
|
| 4 | Always | 21 |
1.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 3 |
0.3%
|