| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15 minutes | 8 | 
                                    
                                    3.3%
                                 | 
| 2 | 15 to 30 minutes | 16 | 
                                    
                                    6.7%
                                 | 
| 3 | 30 to 60 minutes | 53 | 
                                    
                                    22.2%
                                 | 
| 4 | 1 hour to 1 hour and a half | 54 | 
                                    
                                    22.6%
                                 | 
| 5 | 1 hour and a half to 2 hours | 54 | 
                                    
                                    22.6%
                                 | 
| 6 | 2 hours to 2 hours and a half | 22 | 
                                    
                                    9.2%
                                 | 
| 7 | More than 2 hours and a half | 32 | 
                                    
                                    13.4%
                                 | 
| Sysmiss | 12 |