| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1032 |
86%
|
| 1 | Once or twice | 73 |
6.1%
|
| 2 | Several times | 70 |
5.8%
|
| 3 | Many times | 16 |
1.3%
|
| 8 | Refused | 3 |
0.3%
|
| 9 | Don't know | 6 |
0.5%
|