| Value | Category | Cases | |
|---|---|---|---|
| 0 | pre-primary | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | primary | 6 | 
                                                                 
                                    
                                    75%
                                 
                                                             | 
                                                        
                    
| 2 | secondary lower | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    
| 3 | secondary upper | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 4 | higher | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    
| 8 | dk | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 12228 |