| Value | Category | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 851 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1700 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 4500 |  | 
                                    
                    
                        | 4700 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 6700 |  | 
                                    
                    
                        | 8000 |  | 
                                    
                    
                        | 9000 |  | 
                                    
                    
                        | 16000 |  | 
                                    
                    
                        | 9999998 | refusal | 
                                    
                    
                        | 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.