| Value | Category | 
                                    
                    
                        | 0 | Immediately | 
                                    
                    
                        | 100 | Within first hour | 
                                    
                    
                        | 101 | Hours: 1 | 
                                    
                    
                        | 199 | Hours: number missing | 
                                    
                    
                        | 201 | Days: 1 | 
                                    
                    
                        | 299 | Days: 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.