| Value | Category | 
                                    
                    
                        | 1 | Central | 
                                    
                    
                        | 2 | Copperbelt | 
                                    
                    
                        | 3 | Eastern | 
                                    
                    
                        | 4 | Luapula | 
                                    
                    
                        | 5 | Lusaka | 
                                    
                    
                        | 6 | Northern | 
                                    
                    
                        | 7 | Northwestern | 
                                    
                    
                        | 8 | Southern | 
                                    
                    
                        | 9 | Western | 
                            
            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.