| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2173 |
90.5%
|
| 1 | Once or twice | 134 |
5.6%
|
| 2 | Several times | 73 |
3%
|
| 3 | Many times | 18 |
0.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.1%
|