| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not very useful | 1 | 
                                    
                                    0.5%
                                 | 
| 2 | Somewhat useful | 22 | 
                                    
                                    11.9%
                                 | 
| 3 | Useful | 87 | 
                                    
                                    47%
                                 | 
| 4 | Very useful | 75 | 
                                    
                                    40.5%
                                 | 
| Sysmiss | 406 |