| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 439 |
18.4%
|
| 1 | Just once or twice | 453 |
18.9%
|
| 2 | Several times | 718 |
30%
|
| 3 | Many times | 536 |
22.4%
|
| 4 | Always | 206 |
8.6%
|
| 8 | Refused | 11 |
0.5%
|
| 9 | Don't know | 29 |
1.2%
|