| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 2844 |
93.7%
|
| 3 | not present | 68 |
2.2%
|
| 4 | refused | 116 |
3.8%
|
| 6 | other | 8 |
0.3%
|
| Sysmiss | 3445 |