| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 612 |
51%
|
| 1 | Just once or twice | 158 |
13.2%
|
| 2 | Several times | 153 |
12.8%
|
| 3 | Many times | 175 |
14.6%
|
| 4 | Always | 102 |
8.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|