| Value | Category | 
                                    
                    
                        | 1 | Near (less 5km) | 
                                    
                    
                        | 2 | Not far (5-10km) | 
                                    
                    
                        | 3 | Moderately far (11-20km) | 
                                    
                    
                        | 4 | Far (more than 20km) | 
                                    
                    
                        | 5 | Don't know | 
                            
            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.