| Value | Category | Cases | |
|---|---|---|---|
| 0 | 73 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    |
| 1 | 1 primary school | 194 | 
                                                                 
                                    
                                    15.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 973 | 
                                                                 
                                    
                                    78.5%
                                 
                                                             |