| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 | 
                                    
                                    13.9%
                                 | 
| 2 | 2 | 
                                    
                                    5.6%
                                 | |
| 3 | 4 | 
                                    
                                    11.1%
                                 | |
| 4 | 4 | 
                                    
                                    11.1%
                                 | |
| 5 | 4 | 
                                    
                                    11.1%
                                 | |
| 6 | 1 | 
                                    
                                    2.8%
                                 | |
| 7 | 4 | 
                                    
                                    11.1%
                                 | |
| 8 | 5 | 
                                    
                                    13.9%
                                 | |
| 9 | 7 | 
                                    
                                    19.4%
                                 | |
| 10 | Very effective | 0 | 
                                    
                                    0%
                                 | 
| 11 | Don't know | 75 | |
| Sysmiss | 32 |