| Value | Category | Cases | |
|---|---|---|---|
| 1 | Measured | 14307 | 
                                    
                                    98.4%
                                 | 
| 2 | Not present | 51 | 
                                    
                                    0.4%
                                 | 
| 3 | Refused | 34 | 
                                    
                                    0.2%
                                 | 
| 6 | Other | 146 | 
                                    
                                    1%
                                 | 
| 9 | 869 |