| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 |  | 
                                    
                    
                        | 3 |  | 
                                    
                    
                        | 4 |  | 
                                    
                    
                        | 22 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1550 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 3000 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 4200 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 10000 |  | 
                                    
                    
                        | 20000 |  | 
                                    
                    
                        | 60000 |  | 
                                    
                    
                        | 99998 |  | 
                                    
                    
                        | 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.