| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3560 |
69.7%
|
| 1 | Once | 271 |
5.3%
|
| 2 | Twice | 287 |
5.6%
|
| 3 | 3-5 times | 271 |
5.3%
|
| 4 | More than 6 times | 346 |
6.8%
|
| 5 | I do not know | 4 |
0.1%
|
| 6 | Not applicable | 5 |
0.1%
|
| Sysmiss | 361 |