| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 | 
                                    
                                    2%
                                 | 
| 2 | 5 | 
                                    
                                    1.7%
                                 | |
| 3 | 12 | 
                                    
                                    4.1%
                                 | |
| 4 | 11 | 
                                    
                                    3.7%
                                 | |
| 5 | 49 | 
                                    
                                    16.7%
                                 | |
| 6 | 33 | 
                                    
                                    11.2%
                                 | |
| 7 | 44 | 
                                    
                                    15%
                                 | |
| 8 | 24 | 
                                    
                                    8.2%
                                 | |
| 9 | 13 | 
                                    
                                    4.4%
                                 | |
| 10 | Very effective | 8 | 
                                    
                                    2.7%
                                 | 
| 11 | Don't know | 89 | 
                                    
                                    30.3%
                                 | 
| Sysmiss | 7 |