| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3048 |
96.8%
|
| 1 | Once | 32 |
1%
|
| 2 | More than once | 33 |
1%
|
| 3 | Not applicable | 36 |
1.1%
|
| Sysmiss | 1 |