| Value | Category | 
                                    
                    
                        | 1 | 1 - 4 | 
                                    
                    
                        | 2 | 5 - 9 | 
                                    
                    
                        | 3 | 10 - 24 | 
                                    
                    
                        | 4 | 30 - 49 | 
                                    
                    
                        | 5 | 50 - 99 | 
                                    
                    
                        | 6 | More than 100 | 
                                    
                    
                        | 7 | don't know | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.