| Value | Category | 
                                    
                    
                        | 1 | On premises | 
                                    
                    
                        | 2 | <5 metres | 
                                    
                    
                        | 3 | 6-30 metres | 
                                    
                    
                        | 4 | 31-100 metres | 
                                    
                    
                        | 5 | 101-500 metres | 
                                    
                    
                        | 6 | 501 metres - 1 km | 
                                    
                    
                        | 7 | >1 - 3 km | 
                                    
                    
                        | 8 | >3 - 5 km | 
                                    
                    
                        | 9 | >5 km | 
                            
            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.