| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 | Daily of same day | 
                                    
                    
                        | 2 | Daily newspaper of previous day | 
                                    
                    
                        | 3 | Weekly delivery of previous week | 
                                    
                    
                        | 4 | Monthly delivery of previous month | 
                                    
                    
                        | 5 | Other | 
                            
            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.