| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 |
0%
|
|
| 1 | Positive | 3463 |
13.9%
|
| 2 | Negative | 20948 |
84.2%
|
| 3 | Don't know | 459 |
1.8%
|
| 4 | 4 |
0%
|
|
| 7 | 1 |
0%
|
|
| Sysmiss | 537518 |