| Value | Category | Cases | |
|---|---|---|---|
| 1 | Normal | 1046 | 
                                                                 
                                    
                                    90%
                                 
                                                             | 
                                                        
                    
| 2 | Difficult | 116 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6520 |