| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 42 | 
                                                                 
                                    
                                    19%
                                 
                                                             | 
                                                        
                    
| 2 | 20 | 
                                                                 
                                    
                                    9%
                                 
                                                             | 
                                                        
                    |
| 3 | 18 | 
                                                                 
                                    
                                    8.1%
                                 
                                                             | 
                                                        
                    |
| 4 | 28 | 
                                                                 
                                    
                                    12.7%
                                 
                                                             | 
                                                        
                    |
| 5 | 29 | 
                                                                 
                                    
                                    13.1%
                                 
                                                             | 
                                                        
                    |
| 6 | 24 | 
                                                                 
                                    
                                    10.9%
                                 
                                                             | 
                                                        
                    |
| 7 | 19 | 
                                                                 
                                    
                                    8.6%
                                 
                                                             | 
                                                        
                    |
| 8 | 11 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 9 | 11 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 19 | 
                                                                 
                                    
                                    8.6%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 170 | |
| Sysmiss | 39 |