| Value | Category | 
                                    
                    
                        | 1 | Capital city | 
                                    
                    
                        | 2 | City with population over 1 million, other than capital | 
                                    
                    
                        | 3 | 250000-1000000 | 
                                    
                    
                        | 4 | 50000-250000 | 
                                    
                    
                        | 5 | Less than 50000 | 
                            
            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.