| Value | Category | 
                                    
                    
                        | 1 | COLLECTED FROM RUBBISH BIN | 
                                    
                    
                        | 2 | RUBBISH PIT | 
                                    
                    
                        | 3 | BURNING | 
                                    
                    
                        | 4 | PUBLIC RUBBISH HEAP | 
                                    
                    
                        | 5 | OTHER(SPECIFY) | 
                                    
                    
                        | 6 | NONE | 
                            
            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.