| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 12 |
1%
|
| 0 | Never | 1079 |
90.1%
|
| 1 | Once or twice | 44 |
3.7%
|
| 2 | Several times | 13 |
1.1%
|
| 3 | Many times | 13 |
1.1%
|
| 8 | Refused | 36 |
3%
|
| 9 | Don't know | 1 |
0.1%
|