| Value | Category | Cases | |
|---|---|---|---|
| 0 | preschool | 0 | 
                                    
                                    0%
                                 | 
| 1 | primary | 2 | 
                                    
                                    100%
                                 | 
| 2 | secondary | 0 | 
                                    
                                    0%
                                 | 
| 3 | higher | 0 | 
                                    
                                    0%
                                 | 
| 8 | dk | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 6390 |