| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 771 |
64.3%
|
| 1 | Once or twice | 186 |
15.5%
|
| 2 | Several times | 154 |
12.8%
|
| 3 | Many times | 46 |
3.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 43 |
3.6%
|