| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 1722 |
94.4%
|
| 3 | not present | 39 |
2.1%
|
| 4 | refused | 61 |
3.3%
|
| 6 | other | 3 |
0.2%
|
| Sysmiss | 4656 |