| Value | Category | Cases | |
|---|---|---|---|
| 1 | Sample not drawn | 32 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    
| 2 | Dipped cup | 320 | 
                                                                 
                                    
                                    46.8%
                                 
                                                             | 
                                                        
                    
| 3 | Used hose pipe or tap | 10 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    
| 4 | Poured out | 308 | 
                                                                 
                                    
                                    45%
                                 
                                                             | 
                                                        
                    
| 5 | Unable to observe | 11 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    
| 6 | Other | 3 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             |