| Value | Category | 
                                    
                    
                        | 98 | Not given | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1400 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1600 |  | 
                                    
                    
                        | 1700 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 2100 |  | 
                                    
                    
                        | 2200 |  | 
                                    
                    
                        | 2500 |  | 
                                    
                    
                        | 2700 |  | 
                                    
                    
                        | 3000 |  | 
                                    
                    
                        | 3200 |  | 
                                    
                    
                        | 3500 |  | 
                                    
                    
                        | 3700 |  | 
                                    
                    
                        | 3750 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 4200 |  | 
                                    
                    
                        | 4500 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 5500 |  | 
                                    
                    
                        | 5800 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 6200 |  | 
                                    
                    
                        | 6500 |  | 
                                    
                    
                        | 7000 |  | 
                                    
                    
                        | 7500 |  | 
                                    
                    
                        | 8000 |  | 
                                    
                    
                        | 9000 |  | 
                                    
                    
                        | 10000 |  | 
                                    
                    
                        | 11000 |  | 
                                    
                    
                        | 12000 |  | 
                                    
                    
                        | 12500 |  | 
                                    
                    
                        | 13000 |  | 
                                    
                    
                        | 13300 |  | 
                                    
                    
                        | 14000 |  | 
                                    
                    
                        | 15000 |  | 
                                    
                    
                        | 16000 |  | 
                                    
                    
                        | 17000 |  | 
                                    
                    
                        | 17500 |  | 
                                    
                    
                        | 18000 |  | 
                                    
                    
                        | 18700 |  | 
                                    
                    
                        | 19000 |  | 
                                    
                    
                        | 20000 |  | 
                                    
                    
                        | 21000 |  | 
                                    
                    
                        | 25000 |  | 
                                    
                    
                        | 30000 |  | 
                                    
                    
                        | 32000 |  | 
                                    
                    
                        | 35000 |  | 
                                    
                    
                        | 36000 |  | 
                                    
                    
                        | 40000 |  | 
                                    
                    
                        | 45000 |  | 
                                    
                    
                        | 50000 |  | 
                                    
                    
                        | 60000 |  | 
                                    
                    
                        | 65000 |  | 
                                    
                    
                        | 70000 |  | 
                                    
                    
                        | 80000 |  | 
                                    
                    
                        | 88000 |  | 
                                    
                    
                        | 9999999 |  | 
                                    
                    
                        | 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.