| Value | Category | Cases | |
|---|---|---|---|
| 1 | Average | 18 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    
| 2 | Useful | 481 | 
                                                                 
                                    
                                    57.5%
                                 
                                                             | 
                                                        
                    
| 3 | Very Useful | 337 | 
                                                                 
                                    
                                    40.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1450 |