| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 2821 |
55.3%
|
| 1 | Once | 4 |
0.1%
|
| 2 | Twice | 9 |
0.2%
|
| 3 | 3-5 times | 10 |
0.2%
|
| 4 | 6 times and more | 10 |
0.2%
|
| 5 | I do not know | 0 |
0%
|
| 6 | Not applicable | 1890 |
37%
|
| Sysmiss | 361 |