| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than 1 year | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | 3 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    |
| 2 | 11 | 
                                                                 
                                    
                                    9.2%
                                 
                                                             | 
                                                        
                    |
| 3 | 6 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 4 | 22 | 
                                                                 
                                    
                                    18.5%
                                 
                                                             | 
                                                        
                    |
| 5 | 15 | 
                                                                 
                                    
                                    12.6%
                                 
                                                             | 
                                                        
                    |
| 6 | 7 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    |
| 7 | 10 | 
                                                                 
                                    
                                    8.4%
                                 
                                                             | 
                                                        
                    |
| 8 | 12 | 
                                                                 
                                    
                                    10.1%
                                 
                                                             | 
                                                        
                    |
| 9 | 15 | 
                                                                 
                                    
                                    12.6%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 11 | 2 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 12 | 15 | 
                                                                 
                                    
                                    12.6%
                                 
                                                             | 
                                                        
                    |
| 98 | don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 93 |