| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 4418 |
86.5%
|
| 1 | Once | 38 |
0.7%
|
| 2 | Twice | 42 |
0.8%
|
| 3 | 3-5 times | 32 |
0.6%
|
| 4 | More than 6 times | 84 |
1.6%
|
| 5 | I do not know | 1 |
0%
|
| 6 | Not applicable | 129 |
2.5%
|
| Sysmiss | 361 |