| Value | Category | Cases | |
|---|---|---|---|
| 1 | Measured | 18702 |
83.1%
|
| 2 | Not present | 452 |
2%
|
| 3 | Refused | 224 |
1%
|
| 6 | Other | 97 |
0.4%
|
| 7 | Inconsistent | 0 |
0%
|
| 9 | Missing | 389 |
1.7%
|
| 99 | system missing | 2648 |
11.8%
|