| Value | Category | Cases | |
|---|---|---|---|
| 1 | Average | 17 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    
| 2 | Useful | 113 | 
                                                                 
                                    
                                    66.5%
                                 
                                                             | 
                                                        
                    
| 3 | Very Useful | 40 | 
                                                                 
                                    
                                    23.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2116 |