| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 46 | 
                                                                 
                                    
                                    25.6%
                                 
                                                             | 
                                                        
                    
| 2 | 22 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    |
| 3 | 22 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    |
| 4 | 16 | 
                                                                 
                                    
                                    8.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 25 | 
                                                                 
                                    
                                    13.9%
                                 
                                                             | 
                                                        
                    |
| 6 | 14 | 
                                                                 
                                    
                                    7.8%
                                 
                                                             | 
                                                        
                    |
| 7 | 12 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 9 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 13 | 
                                                                 
                                    
                                    7.2%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 209 | |
| Sysmiss | 41 |