| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 109 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    
| 1 | Central heating | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 2 | Electricity | 442 | 
                                                                 
                                    
                                    33.4%
                                 
                                                             | 
                                                        
                    
| 3 | Natural gas | 138 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    
| 4 | Liquefied gas | 4 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 5 | Oil and diesel | 6 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 6 | Wood | 218 | 
                                                                 
                                    
                                    16.5%
                                 
                                                             | 
                                                        
                    
| 9 | Other | 406 | 
                                                                 
                                    
                                    30.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3860 |