| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 266 |
22.2%
|
| 1 | Just once or twice | 99 |
8.3%
|
| 2 | Several times | 397 |
33.1%
|
| 3 | Many times | 280 |
23.3%
|
| 4 | Always | 156 |
13%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 1 |
0.1%
|