| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 2103 |
90.1%
|
| 3 | not present | 184 |
7.9%
|
| 4 | refused | 28 |
1.2%
|
| 6 | other | 7 |
0.3%
|
| 9 | 13 |
0.6%
|
|
| 11 | .Z | 13332 |