| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 2494 |
48.9%
|
| 1 | Once | 264 |
5.2%
|
| 2 | Twice | 414 |
8.1%
|
| 3 | 3-5 times | 552 |
10.8%
|
| 4 | 6 times and more | 1012 |
19.8%
|
| 5 | I do not know | 4 |
0.1%
|
| 6 | Not applicable | 4 |
0.1%
|
| Sysmiss | 361 |