| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than one hour | 1052 | 
                                                                 
                                    
                                    87.5%
                                 
                                                             | 
                                                        
                    
| 2 | 1-23 hours | 113 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    
| 3 | +24 hours | 22 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    
| 4 | Don't know | 15 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1538 |