| Value | Category | Cases | |
|---|---|---|---|
| 1 | Primary or none | 1299 | 
                                    
                                    27.2%
                                 | 
| 2 | Secondary | 1870 | 
                                    
                                    39.1%
                                 | 
| 3 | Higher | 913 | 
                                    
                                    19.1%
                                 | 
| Sysmiss | 695 | 
                                    
                                    14.5%
                                 |