| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 19 |
4.1%
|
| 2 | No | 58 |
12.4%
|
| 3 | Unknown | 132 |
28.3%
|
| 4 | Known positive | 258 |
55.2%
|
| Sysmiss | 2084 |