| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 5 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    
| 2 | Between 2 and 4 weeks | 3 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 3 | Between 1 and 2 months | 20 | 
                                                                 
                                    
                                    9%
                                 
                                                             | 
                                                        
                    
| 4 | Between 2 and 6 months | 11 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    
| 5 | More than 6 months | 44 | 
                                                                 
                                    
                                    19.8%
                                 
                                                             | 
                                                        
                    
| 6 | Don’t know (uncertain) | 139 | 
                                                                 
                                    
                                    62.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1785 |