| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3102 |
98.5%
|
| 1 | Once | 34 |
1.1%
|
| 2 | More than once | 13 |
0.4%
|
| 3 | Not applicable | 0 |
0%
|
| 4 | No answer/ refused to | 0 |
0%
|
| Sysmiss | 1 |