| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 6418 | 
                                    
                                    72.2%
                                 | 
| 2 | 30 minutes to 1 hour | 1448 | 
                                    
                                    16.3%
                                 | 
| 3 | 1 - 5 Hours | 960 | 
                                    
                                    10.8%
                                 | 
| 4 | More than 5 Hours | 59 | 
                                    
                                    0.7%
                                 | 
| Sysmiss | 590 |