| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3506 |
68.7%
|
| 1 | Once | 192 |
3.8%
|
| 2 | Twice | 285 |
5.6%
|
| 3 | 3-5 times | 272 |
5.3%
|
| 4 | 6 times and more | 485 |
9.5%
|
| 5 | I do not know | 0 |
0%
|
| 6 | Not applicable | 4 |
0.1%
|
| Sysmiss | 361 |