| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 46 | 
                                                                 
                                    
                                    19.1%
                                 
                                                             | 
                                                        
                    
| 2 | 25 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 3 | 34 | 
                                                                 
                                    
                                    14.1%
                                 
                                                             | 
                                                        
                    |
| 4 | 27 | 
                                                                 
                                    
                                    11.2%
                                 
                                                             | 
                                                        
                    |
| 5 | 25 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 6 | 20 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 7 | 22 | 
                                                                 
                                    
                                    9.1%
                                 
                                                             | 
                                                        
                    |
| 8 | 12 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 9 | 11 | 
                                                                 
                                    
                                    4.6%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 19 | 
                                                                 
                                    
                                    7.9%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 152 | |
| Sysmiss | 37 |