| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 2370 |
93.2%
|
| 3 | not present | 61 |
2.4%
|
| 4 | refused | 107 |
4.2%
|
| 6 | other | 4 |
0.2%
|
| Sysmiss | 3939 |