| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1652 |
68.8%
|
| 1 | Just once or twice | 348 |
14.5%
|
| 2 | Several times | 262 |
10.9%
|
| 3 | Many times | 116 |
4.8%
|
| 4 | Always | 20 |
0.8%
|
| 8 | Refused | 1 |
0%
|
| 9 | Don't know | 1 |
0%
|