| Value | Category | Cases | |
|---|---|---|---|
| 0 | Informal | 1939 | 
                                                                 
                                    
                                    51.7%
                                 
                                                             | 
                                                        
                    
| 1 | Formal | 1812 | 
                                                                 
                                    
                                    48.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 12679 |