| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1105 |
46.2%
|
| 1 | Just once or twice | 467 |
19.5%
|
| 2 | Several times | 450 |
18.8%
|
| 3 | Many times | 237 |
9.9%
|
| 4 | Always | 111 |
4.6%
|
| 8 | Refused | 10 |
0.4%
|
| 9 | Don't know | 12 |
0.5%
|