| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 795 |
66.3%
|
| 1 | Once or twice | 184 |
15.3%
|
| 2 | Several times | 150 |
12.5%
|
| 3 | Many times | 63 |
5.3%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 7 |
0.6%
|