| Value | Category | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 2500 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 7000 |  | 
                                    
                    
                        | 7500 |  | 
                                    
                    
                        | 10000 |  | 
                                    
                    
                        | 12500 |  | 
                                    
                    
                        | 15000 |  | 
                                    
                    
                        | 20000 |  | 
                                    
                    
                        | 25000 |  | 
                                    
                    
                        | 30000 |  | 
                                    
                    
                        | 40000 |  | 
                                    
                    
                        | 50000 |  | 
                                    
                    
                        | -9 | dk | 
                                    
                    
                        | 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.