| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 | 
                                    
                                    2.9%
                                 | 
| 2 | 2 | 
                                    
                                    2.9%
                                 | |
| 3 | 5 | 
                                    
                                    7.1%
                                 | |
| 4 | 5 | 
                                    
                                    7.1%
                                 | |
| 5 | 8 | 
                                    
                                    11.4%
                                 | |
| 6 | 6 | 
                                    
                                    8.6%
                                 | |
| 7 | 15 | 
                                    
                                    21.4%
                                 | |
| 8 | 14 | 
                                    
                                    20%
                                 | |
| 9 | 11 | 
                                    
                                    15.7%
                                 | |
| 10 | Very effective | 2 | 
                                    
                                    2.9%
                                 | 
| 11 | N/A | 53 | |
| Sysmiss | 20 |