| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 589 |
49.1%
|
| 1 | Just once or twice | 202 |
16.8%
|
| 2 | Several times | 203 |
16.9%
|
| 3 | Many times | 129 |
10.8%
|
| 4 | Always | 76 |
6.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|