| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 993 |
82.8%
|
| 1 | Once or twice | 86 |
7.2%
|
| 2 | Several times | 78 |
6.5%
|
| 3 | Many times | 42 |
3.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|