| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 48 | 
                                                                 
                                    
                                    24.9%
                                 
                                                             | 
                                                        
                    
| 2 | 20 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 3 | 20 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 4 | 23 | 
                                                                 
                                    
                                    11.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 29 | 
                                                                 
                                    
                                    15%
                                 
                                                             | 
                                                        
                    |
| 6 | 16 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 7 | 10 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 8 | 6 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 9 | 13 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 8 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 194 | |
| Sysmiss | 43 |