| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 2707 |
96.3%
|
| 3 | not present | 72 |
2.6%
|
| 4 | refused | 23 |
0.8%
|
| 6 | other | 9 |
0.3%
|
| Sysmiss | 3581 |