| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 5 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    
| 2 | Between 2 and 4 weeks | 5 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    
| 3 | Between 1 and 2 months | 11 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    
| 4 | Between 2 and 6 months | 14 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    
| 5 | More than 6 months | 54 | 
                                                                 
                                    
                                    27.4%
                                 
                                                             | 
                                                        
                    
| 6 | Don’t know (uncertain) | 108 | 
                                                                 
                                    
                                    54.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1880 |