| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1244 |
77.8%
|
| 1 | Once or twice | 173 |
10.8%
|
| 2 | Several times | 133 |
8.3%
|
| 3 | Many times | 47 |
2.9%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 3 |
0.2%
|