| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3862 |
75.7%
|
| 1 | Once | 25 |
0.5%
|
| 2 | Twice | 14 |
0.3%
|
| 3 | 3-5 times | 24 |
0.5%
|
| 4 | 6 times and more | 38 |
0.7%
|
| 5 | I do not know | 1 |
0%
|
| 6 | Not applicable | 780 |
15.3%
|
| Sysmiss | 361 |