| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 4206 |
96.6%
|
| 3 | not present | 104 |
2.4%
|
| 4 | refused | 31 |
0.7%
|
| 6 | other | 13 |
0.3%
|
| Sysmiss | 27321 |