| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1231 |
51.5%
|
| 1 | Just once or twice | 441 |
18.4%
|
| 2 | Several times | 427 |
17.9%
|
| 3 | Many times | 208 |
8.7%
|
| 4 | Always | 56 |
2.3%
|
| 8 | Refused | 9 |
0.4%
|
| 9 | Don't know | 20 |
0.8%
|