| Value | 
                    Category | 
                                                                            
                                    
                    
                        | -9 | 
                        NR  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | -7 | 
                        NA  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | -6 | 
                        NS  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 300 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 540 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 1000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 1272 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 3400 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 4400 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 4550 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 6000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 7200 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 10000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 15000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 25000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 30060 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 75000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 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.