| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 13351 | 
                                                                 
                                    
                                    63.2%
                                 
                                                             | 
                                                        
                    
| 2 | 31-60 minutes | 5972 | 
                                                                 
                                    
                                    28.3%
                                 
                                                             | 
                                                        
                    
| 3 | 61-120 minutes | 761 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    
| 4 | More than 2 hours | 147 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 9 | Unspecified | 890 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             |