| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 75 |
6.3%
|
| 1 | Just once or twice | 72 |
6%
|
| 2 | Several times | 352 |
29.3%
|
| 3 | Many times | 588 |
49%
|
| 4 | Always | 112 |
9.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|