| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2062 |
85.9%
|
| 1 | Just once or twice | 137 |
5.7%
|
| 2 | Several times | 127 |
5.3%
|
| 3 | Many times | 61 |
2.5%
|
| 4 | Always | 12 |
0.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0%
|