| Value | Category | 
                                    
                    
                        | 1 | Firewood | 
                                    
                    
                        | 2 | Charcoal | 
                                    
                    
                        | 3 | Gas | 
                                    
                    
                        | 4 | Biogaz | 
                                    
                    
                        | 5 | Solar power | 
                                    
                    
                        | 6 | Electricity | 
                                    
                    
                        | 7 | Oil or kerosene | 
                                    
                    
                        | 8 | Crop waste | 
                                    
                    
                        | 9 | Animal dung | 
                                    
                    
                        | 10 | Other | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.