| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3136 |
99.6%
|
| 1 | Once | 6 |
0.2%
|
| 2 | More than once | 6 |
0.2%
|
| 3 | Not applicable | 1 |
0%
|
| 4 | No answer/ refused to | 0 |
0%
|
| Sysmiss | 1 |