| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 998 |
41.7%
|
| 1 | Just once or twice | 550 |
23%
|
| 2 | Several times | 573 |
24%
|
| 3 | Many times | 206 |
8.6%
|
| 4 | Always | 45 |
1.9%
|
| 8 | Refused | 10 |
0.4%
|
| 9 | Don't know | 10 |
0.4%
|