| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 5607 | 
                                    
                                    60.5%
                                 | 
| 2 | 30 minutes to 1 hour | 1642 | 
                                    
                                    17.7%
                                 | 
| 3 | 1 - 5 Hours | 1804 | 
                                    
                                    19.5%
                                 | 
| 4 | More than 5 Hours | 220 | 
                                    
                                    2.4%
                                 | 
| Sysmiss | 202 |