| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1056 |
66%
|
| 1 | Just once or twice | 254 |
15.9%
|
| 2 | Several times | 177 |
11.1%
|
| 3 | Many times | 71 |
4.4%
|
| 4 | Always | 41 |
2.6%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|