| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 9550 |
93.9%
|
| 3 | not present | 458 |
4.5%
|
| 4 | refused | 93 |
0.9%
|
| 6 | other | 23 |
0.2%
|
| 9 | 42 |
0.4%
|
|
| Sysmiss | 66754 |