| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 853 |
71.1%
|
| 1 | Just once or twice | 152 |
12.7%
|
| 2 | Several times | 108 |
9%
|
| 3 | Many times | 44 |
3.7%
|
| 4 | Always | 42 |
3.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|