| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 624 |
52%
|
| 1 | Just once or twice | 134 |
11.2%
|
| 2 | Several times | 249 |
20.8%
|
| 3 | Many times | 165 |
13.8%
|
| 4 | Always | 28 |
2.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|