| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 384 |
32%
|
| 1 | Just once or twice | 105 |
8.8%
|
| 2 | Several times | 252 |
21%
|
| 3 | Many times | 279 |
23.3%
|
| 4 | Always | 180 |
15%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|