| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2071 |
86.6%
|
| 1 | Once or twice | 171 |
7.1%
|
| 2 | Several times | 60 |
2.5%
|
| 3 | Many times | 24 |
1%
|
| 8 | Refused | 10 |
0.4%
|
| 9 | Don't know | 56 |
2.3%
|