| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 2622 |
98.1%
|
| 3 | not present | 28 |
1%
|
| 4 | refused | 6 |
0.2%
|
| 6 | other | 18 |
0.7%
|
| Sysmiss | 2747 |