| Value | Category | 
                                    
                    
                        | 1 | None | 
                                    
                    
                        | 2 | Less than 100 KM | 
                                    
                    
                        | 3 | 100-200 KM | 
                                    
                    
                        | 4 | 200-300 KM | 
                                    
                    
                        | 5 | 300-400 KM | 
                                    
                    
                        | 6 | 401-500 KM | 
                                    
                    
                        | 7 | 501-700 KM | 
                                    
                    
                        | 8 | 701 and more | 
                                    
                    
                        | 9 | Missing | 
                            
            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.