| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1639 |
68.3%
|
| 1 | Just once or twice | 330 |
13.8%
|
| 2 | Several times | 265 |
11%
|
| 3 | Many times | 127 |
5.3%
|
| 4 | Always | 37 |
1.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.1%
|