| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 6562 |
95.7%
|
| 3 | not present | 210 |
3.1%
|
| 4 | refused | 53 |
0.8%
|
| 6 | other | 11 |
0.2%
|
| 9 | 21 |
0.3%
|
|
| 11 | .Z | 8810 |