| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 3929 |
92%
|
| 3 | not present | 132 |
3.1%
|
| 4 | refused | 199 |
4.7%
|
| 6 | other | 9 |
0.2%
|
| Sysmiss | 2212 |