| Value | Category | 
                                    
                    
                        | 1 | Monthly? | 
                                    
                    
                        | 2 | Weekly? | 
                                    
                    
                        | 3 | Fortnightly (Every two weeks)? | 
                                    
                    
                        | 4 | Daily? | 
                                    
                    
                        | 5 | Hourly? | 
                                    
                    
                        | 6 | Annually? | 
                                    
                    
                        | 7 | Refused/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.