| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 128 |
10.7%
|
| 1 | Just once or twice | 227 |
18.9%
|
| 2 | Several times | 322 |
26.8%
|
| 3 | Many times | 311 |
25.9%
|
| 4 | Always | 210 |
17.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.2%
|