| Value | Category | Cases | |
|---|---|---|---|
| 0 | Informal | 216 | 
                                                                 
                                    
                                    39.7%
                                 
                                                             | 
                                                        
                    
| 1 | Formal | 328 | 
                                                                 
                                    
                                    60.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1533 |