| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4457 |
98.9%
|
| 2 | Once | 12 |
0.3%
|
| 3 | More than once | 2 |
0%
|
| 4 | Not applicable | 18 |
0.4%
|
| Sysmiss | 17 |