| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 4344 |
85.1%
|
| 1 | Once | 48 |
0.9%
|
| 2 | Twice | 110 |
2.2%
|
| 3 | 3-5 times | 107 |
2.1%
|
| 4 | More than 6 times | 126 |
2.5%
|
| 5 | I do not know | 3 |
0.1%
|
| 6 | Not applicable | 6 |
0.1%
|
| Sysmiss | 361 |