| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 199 | 
                        Days: number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 299 | 
                        Weeks: number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 399 | 
                        Months: number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 499 | 
                        Years: number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            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.