| Value | Category | Cases | |
|---|---|---|---|
| 0 | < 1 year completed | 2 | 
                                    
                                    13.3%
                                 | 
| 2 | 5 | 
                                    
                                    33.3%
                                 | |
| 3 | 4 | 
                                    
                                    26.7%
                                 | |
| 4 | 4 | 
                                    
                                    26.7%
                                 | |
| 98 | dk | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 15336 |