| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 863 |
99.2%
|
| 3 | not present | 2 |
0.2%
|
| 4 | refused | 2 |
0.2%
|
| 6 | other | 3 |
0.3%
|
| Sysmiss | 12079 |