| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 | 
                                                                 
                                    
                                    10.3%
                                 
                                                             | 
                                                        
                    
| 3 | 2 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    |
| 4 | 3 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 5 | 2 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    |
| 6 | 3 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 7 | 5 | 
                                                                 
                                    
                                    12.8%
                                 
                                                             | 
                                                        
                    |
| 8 | 8 | 
                                                                 
                                    
                                    20.5%
                                 
                                                             | 
                                                        
                    |
| 9 | 7 | 
                                                                 
                                    
                                    17.9%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 5 | 
                                                                 
                                    
                                    12.8%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 57 |