| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 995 |
82.6%
|
| 1 | Once or twice | 65 |
5.4%
|
| 2 | Several times | 86 |
7.1%
|
| 3 | Many times | 50 |
4.2%
|
| 8 | Refused | 2 |
0.2%
|
| 9 | Don't know | 6 |
0.5%
|