| Value | Category | 
                                    
                    
                        | A-X |  | 
                                    
                    
                        | B-1 TO B-8 |  | 
                                    
                    
                        | B1-B8 |  | 
                                    
                    
                        | B1-B8 & X |  | 
                                    
                    
                        | C,D,E |  | 
                                    
                    
                        | C-X |  | 
                                    
                    
                        | D-X |  | 
                                    
                    
                        | E-X |  | 
                                    
                    
                        | F-X |  | 
                                    
                    
                        | G-V |  | 
                                    
                    
                        | G-X |  | 
                                    
                    
                        | H-X |  | 
                                    
                    
                        | I-X |  | 
                                    
                    
                        | J-X |  | 
                                    
                    
                        | K-X |  | 
                                    
                    
                        | L-X |  | 
                                    
                    
                        | M-X |  | 
                                    
                    
                        | N |  | 
                                    
                    
                        | N-X |  | 
                                    
                    
                        | O |  | 
                                    
                    
                        | P-X |  | 
                                    
                    
                        | Q-X |  | 
                                    
                    
                        | T |  | 
                                    
                    
                        | V |  | 
                                    
                    
                        | V-X |  | 
                                    
                    
                        | VISIT 2 |  | 
                            
            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.