| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | From electricity invoice | 916 | 187608 | 
                                                                 
                                    
                                    32.6%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 2 | Estimation by remembering invoice items | 1850 | 376135 | 
                                                                 
                                    
                                    65.3%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 3 | Household record | 34 | 6585 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 4 | Others | 3 | 642 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                            
                        
                        
                            
                    
| Sysmiss | 32 | 4763 |