| Value | Category | 
                                    
                    
                        | -9 | Don't Know | 
                                    
                    
                        | -8 | Refused | 
                                    
                    
                        | -5 | Not Applicable | 
                                    
                    
                        | -3 | Missing | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 3500 |  | 
                                    
                    
                        | 7500 |  | 
                                    
                    
                        | 18000 |  | 
                                    
                    
                        | 19500 |  | 
                                    
                    
                        | 23000 |  | 
                                    
                    
                        | 30000 |  | 
                                    
                    
                        | 36000 |  | 
                                    
                    
                        | 45000 |  | 
                                    
                    
                        | 60000 |  | 
                                    
                    
                        | 100000 |  | 
                                    
                    
                        | 300000 |  | 
                                    
                    
                        | 400000 |  | 
                                    
                    
                        | 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.