| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 100 | 
                        Less than 1 hour  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 101 | 
                        1 hour  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 102 | 
                        2 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 103 | 
                        3 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 104 | 
                        4 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 105 | 
                        5 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 106 | 
                        6 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 107 | 
                        7 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 108 | 
                        8 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 109 | 
                        9 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 110 | 
                        10 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 111 | 
                        11 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 112 | 
                        12 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 113 | 
                        13 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 114 | 
                        14 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 115 | 
                        15 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 116 | 
                        16 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 117 | 
                        17 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 118 | 
                        18 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 119 | 
                        19 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 120 | 
                        20 hours  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 199 | 
                        Hours, number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 200 | 
                        Less than 1 day  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 201 | 
                        1 day  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 202 | 
                        2 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 203 | 
                        3 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 204 | 
                        4 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 205 | 
                        5 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 206 | 
                        6 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 207 | 
                        7 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 208 | 
                        8 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 209 | 
                        9 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 210 | 
                        10 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 211 | 
                        11 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 212 | 
                        12 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 213 | 
                        13 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 214 | 
                        14 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 215 | 
                        15 days  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 299 | 
                        Days, number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 300 | 
                        Less than 1 week  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 301 | 
                        1 week  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 302 | 
                        2 weeks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 303 | 
                        3 weeks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 304 | 
                        4 weeks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 305 | 
                        5 weeks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 306 | 
                        6 weeks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 307 | 
                        7 weeks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 399 | 
                        Weeks, number missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 997 | 
                        Don't know  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 998 | 
                        Missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 999 | 
                        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.