| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 524 |
43.7%
|
| 1 | Just once or twice | 140 |
11.7%
|
| 2 | Several times | 151 |
12.6%
|
| 3 | Many times | 107 |
8.9%
|
| 4 | Always | 78 |
6.5%
|
| 8 | Refused | 18 |
1.5%
|
| 9 | Don't know | 182 |
15.2%
|