| Value | Category | 
                                    
                    
                        | A |  | 
                                    
                    
                        | AB |  | 
                                    
                    
                        | ABC |  | 
                                    
                    
                        | ABCD |  | 
                                    
                    
                        | ABCDE |  | 
                                    
                    
                        | ABCDEF |  | 
                                    
                    
                        | ABCE |  | 
                                    
                    
                        | ABD |  | 
                                    
                    
                        | ABDE |  | 
                                    
                    
                        | ABDEF |  | 
                                    
                    
                        | AC |  | 
                                    
                    
                        | ACD |  | 
                                    
                    
                        | ACDE |  | 
                                    
                    
                        | ACDF |  | 
                                    
                    
                        | ACE |  | 
                                    
                    
                        | ACEF |  | 
                                    
                    
                        | ACF |  | 
                                    
                    
                        | AE |  | 
                                    
                    
                        | B |  | 
                                    
                    
                        | BCD |  | 
                                    
                    
                        | BE |  | 
                                    
                    
                        | C |  | 
                                    
                    
                        | CD |  | 
                                    
                    
                        | CE |  | 
                                    
                    
                        | CEF |  | 
                                    
                    
                        | CF |  | 
                                    
                    
                        | CG |  | 
                                    
                    
                        | E |  | 
                                    
                    
                        | F |  | 
                                    
                    
                        | X |  | 
                            
            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.