| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1047 |
87.3%
|
| 1 | Once or twice | 45 |
3.8%
|
| 2 | Several times | 75 |
6.3%
|
| 3 | Many times | 27 |
2.3%
|
| 8 | Refused | 5 |
0.4%
|
| 9 | Don't know | 1 |
0.1%
|