| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 108 |
9%
|
| 1 | Just once or twice | 53 |
4.4%
|
| 2 | Several times | 320 |
26.7%
|
| 3 | Many times | 384 |
32%
|
| 4 | Always | 333 |
27.8%
|
| 8 | Refused | 2 |
0.2%
|
| 9 | Don't know | 0 |
0%
|