| Value | Category | Cases | |
|---|---|---|---|
| 1 | primary | 59 | 
                                                                 
                                    
                                    48.4%
                                 
                                                             | 
                                                        
                    
| 2 | lower secondary | 36 | 
                                                                 
                                    
                                    29.5%
                                 
                                                             | 
                                                        
                    
| 3 | upper secondary | 18 | 
                                                                 
                                    
                                    14.8%
                                 
                                                             | 
                                                        
                    
| 4 | higher | 6 | 
                                                                 
                                    
                                    4.9%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 3 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 90 |