| Value | Category | 
                                    
                    
                        | 0 | Period less than one year | 
                                    
                    
                        | 1 | 1 year or more but less than 2 years | 
                                    
                    
                        | 2 | 2 year or more but less than 3 years | 
                                    
                    
                        | 3 | 3 year or more but less than 4 years | 
                                    
                    
                        | 4 | 4 year or more but less than 5 years | 
                                    
                    
                        | 5 | 5 year or more but less than 6 years | 
                                    
                    
                        | 6 | 6 year or more but less than 7 years | 
                                    
                    
                        | 7 | 7 year or more but less than 8 years | 
                                    
                    
                        | 8 | 8 year or more but less than 9 years | 
                                    
                    
                        | 9 | 9 year or more but less than 10 years | 
                                    
                    
                        | 10 | 10 year or more but less than 11 years | 
                                    
                    
                        | 11 | 11 year or more but less than 12 years | 
                                    
                    
                        | 12 | 12 year or more but less than 13 years | 
                                    
                    
                        | 13 | 13 year or more but less than 14 years | 
                                    
                    
                        | 14 | 14 year or more but less than 15 years | 
                                    
                    
                        | 15 | 15 year or more but less than 16 years | 
                                    
                    
                        | 16 | 16 year or more but less than 17 years | 
                                    
                    
                        | 17 | 17 year or more but less than 18 years | 
                                    
                    
                        | 18 | 18 year or more but less than 19 years | 
                                    
                    
                        | 19 | 19 year or more but less than 20 years | 
                                    
                    
                        | 20 | 20 year or more but less than 21 years | 
                                    
                    
                        | 21 | 21 year or more but less than 22 years | 
                                    
                    
                        | 22 | 22 year or more but less than 23 years | 
                                    
                    
                        | 23 | 23 year or more but less than 24 years | 
                                    
                    
                        | 24 | 24 year or more but less than 25 years | 
                                    
                    
                        | 25 | 25 year or more but less than 26 years | 
                                    
                    
                        | 26 | 26 year or more but less than 27 years | 
                                    
                    
                        | 27 | 27 year or more but less than 28 years | 
                                    
                    
                        | 28 | 28 year or more but less than 29 years | 
                                    
                    
                        | 29 | 29 year or more but less than 30 years | 
                                    
                    
                        | 30 | 30 year or more but less than 31 years | 
                                    
                    
                        | 31 | 31 year or more but less than 32 years | 
                                    
                    
                        | 32 | 32 year or more but less than 33 years | 
                                    
                    
                        | 33 | 33 year or more but less than 34 years | 
                                    
                    
                        | 34 | 34 year or more but less than 35 years | 
                                    
                    
                        | 35 | 35 year or more but less than 36 years | 
                                    
                    
                        | 36 | 36 year or more but less than 37 years | 
                                    
                    
                        | 37 | 37 year or more but less than 38 years | 
                                    
                    
                        | 38 | 38 year or more but less than 39 years | 
                                    
                    
                        | 39 | 39 year or more but less than 40 years | 
                                    
                    
                        | 40 | 40 year or more but less than 41 years | 
                                    
                    
                        | 41 | 41 year or more but less than 42 years | 
                                    
                    
                        | 42 | 42 year or more but less than 43 years | 
                                    
                    
                        | 43 | 43 year or more but less than 44 years | 
                                    
                    
                        | 44 | 44 year or more but less than 45 years | 
                                    
                    
                        | 45 | 45 year or more but less than 46 years | 
                                    
                    
                        | 46 | 46 year or more but less than 47 years | 
                                    
                    
                        | 47 | 47 year or more but less than 48 years | 
                                    
                    
                        | 48 | 48 year or more but less than 49 years | 
                                    
                    
                        | 49 | 49 year or more but less than 50 years | 
                                    
                    
                        | 50 | 50 year or more but less than 51 years | 
                                    
                    
                        | 51 | 51 year or more but less than 52 years | 
                                    
                    
                        | 52 | 52 year or more but less than 53 years | 
                                    
                    
                        | 53 | 53 year or more but less than 54 years | 
                                    
                    
                        | 54 | 54 year or more but less than 55 years | 
                                    
                    
                        | 55 | 55 year or more but less than 56 years | 
                                    
                    
                        | 56 | 56 year or more but less than 57 years | 
                                    
                    
                        | 57 | 57 year or more but less than 58 years | 
                                    
                    
                        | 58 | 58 year or more but less than 59 years | 
                                    
                    
                        | 59 | 59 year or more but less than 60 years | 
                                    
                    
                        | 60 | 60 year or more but less than 61 years | 
                                    
                    
                        | 61 | 61 year or more but less than 62 years | 
                                    
                    
                        | 62 | 62 year or more but less than 63 years | 
                                    
                    
                        | 63 | 63 year or more but less than 64 years | 
                                    
                    
                        | 64 | 64 year or more but less than 65 years | 
                                    
                    
                        | 65 | 65 year or more but less than 66 years | 
                                    
                    
                        | 66 | 66 year or more but less than 67 years | 
                                    
                    
                        | 67 | 67 year or more but less than 68 years | 
                                    
                    
                        | 68 | 68 year or more but less than 69 years | 
                                    
                    
                        | 69 | 69 year or more but less than 70 years | 
                                    
                    
                        | 70 | 70 year or more but less than 71 years | 
                                    
                    
                        | 71 | 71 year or more but less than 72 years | 
                                    
                    
                        | 72 | 72 year or more but less than 73 years | 
                                    
                    
                        | 73 | 73 year or more but less than 74 years | 
                                    
                    
                        | 74 | 74 year or more but less than 75 years | 
                                    
                    
                        | 75 | 75 year or more but less than 76 years | 
                                    
                    
                        | 76 | 76 year or more but less than 77 years | 
                                    
                    
                        | 77 | 77 year or more but less than 78 years | 
                                    
                    
                        | 78 | 78 year or more but less than 79 years | 
                                    
                    
                        | 79 | 79 year or more but less than 80 years | 
                                    
                    
                        | 80 | 80 year or more but less than 81 years | 
                                    
                    
                        | 81 | 81 year or more but less than 82 years | 
                                    
                    
                        | 82 | 82 year or more but less than 83 years | 
                                    
                    
                        | 83 | 83 year or more but less than 84 years | 
                                    
                    
                        | 84 | 84 year or more but less than 85 years | 
                                    
                    
                        | 85 | 85 year or more but less than 86 years | 
                                    
                    
                        | 86 | 86 year or more but less than 87 years | 
                                    
                    
                        | 87 | 87 year or more but less than 88 years | 
                                    
                    
                        | 88 | 88 year or more but less than 89 years | 
                                    
                    
                        | 90 | 89 year or more but less than 90 years | 
                                    
                    
                        | 99 | NIU (not in universe) | 
                            
            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.