| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 26 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 2 | Between 2 and 4 weeks | 45 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    
| 3 | Between 1 and 2 months | 167 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    
| 4 | Between 2 and 6 months | 409 | 
                                                                 
                                    
                                    8.1%
                                 
                                                             | 
                                                        
                    
| 5 | More than 6 months | 2832 | 
                                                                 
                                    
                                    56.1%
                                 
                                                             | 
                                                        
                    
| 6 | Don’t know (uncertain) | 1567 | 
                                                                 
                                    
                                    31.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 434 |