| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1939 |
80.8%
|
| 1 | Once or twice | 200 |
8.3%
|
| 2 | Several times | 159 |
6.6%
|
| 3 | Many times | 76 |
3.2%
|
| 8 | Refused | 2 |
0.1%
|
| 9 | Don't know | 24 |
1%
|