| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 545 |
17.3%
|
| 1 | Once | 8 |
0.3%
|
| 2 | More than once | 5 |
0.2%
|
| 3 | Not applicable | 2588 |
82.2%
|
| 4 | No answer/ refused to | 3 |
0.1%
|
| Sysmiss | 1 |