| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3063 |
97.2%
|
| 1 | Once | 61 |
1.9%
|
| 2 | More than once | 25 |
0.8%
|
| 3 | Not applicable | 0 |
0%
|
| Sysmiss | 1 |