| Value | Category | Cases | |
|---|---|---|---|
| 1 | Two years or less | 2567 | 
                                                                 
                                    
                                    26.5%
                                 
                                                             | 
                                                        
                    
| 2 | Three to five years | 1548 | 
                                                                 
                                    
                                    16%
                                 
                                                             | 
                                                        
                    
| 3 | More than five years | 5268 | 
                                                                 
                                    
                                    54.4%
                                 
                                                             | 
                                                        
                    
| 4 | Don’t know | 309 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 5636 |