| Value | Category | Cases | |
|---|---|---|---|
| 1 | below 15 minutes | 1241 | 
                                    
                                    34.2%
                                 | 
| 2 | 16-30 minutes | 1348 | 
                                    
                                    37.2%
                                 | 
| 3 | 31-45 minutes | 394 | 
                                    
                                    10.9%
                                 | 
| 4 | 46-60 minutes | 337 | 
                                    
                                    9.3%
                                 | 
| 5 | 61-90 minutes | 134 | 
                                    
                                    3.7%
                                 | 
| 6 | 91-120 minutes | 70 | 
                                    
                                    1.9%
                                 | 
| 7 | above 120 minutes | 100 | 
                                    
                                    2.8%
                                 | 
| Sysmiss | 1330 |