| Value | Category | Cases | |
|---|---|---|---|
| 1 | Propane | 382 | 
                                    
                                    24.9%
                                 | 
| 2 | Kerosene | 6 | 
                                    
                                    0.4%
                                 | 
| 3 | Coal | 936 | 
                                    
                                    61.1%
                                 | 
| 4 | wood | 199 | 
                                    
                                    13%
                                 | 
| 98 | Do not know | 9 | 
                                    
                                    0.6%
                                 |