| Value | Category | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1600 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 2400 |  | 
                                    
                    
                        | 2700 |  | 
                                    
                    
                        | 3000 |  | 
                                    
                    
                        | 3500 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 4500 |  | 
                                    
                    
                        | 4900 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 5350 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 7000 |  | 
                                    
                    
                        | 12000 |  | 
                                    
                    
                        | 99999998 | 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.