| Value | Category | Cases | |
|---|---|---|---|
| 1 | None or Basic | 6460 | 
                                    
                                    13.8%
                                 | 
| 2 | Secondary | 6780 | 
                                    
                                    14.5%
                                 | 
| 3 | Higher | 7439 | 
                                    
                                    15.9%
                                 | 
| 7 | No information | 43 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 26007 | 
                                    
                                    55.7%
                                 |