| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 2638 |
91.4%
|
| 1 | Once | 98 |
3.4%
|
| 2 | Twice | 38 |
1.3%
|
| 3 | 3-5 times | 61 |
2.1%
|
| 4 | 6 times and more | 43 |
1.5%
|
| 5 | I do not know | 1 |
0%
|
| 6 | Not applicable | 6 |
0.2%
|
| Sysmiss | 1 |