| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 44 | 
                                                                 
                                    
                                    22.4%
                                 
                                                             | 
                                                        
                    
| 2 | 27 | 
                                                                 
                                    
                                    13.8%
                                 
                                                             | 
                                                        
                    |
| 3 | 15 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 4 | 19 | 
                                                                 
                                    
                                    9.7%
                                 
                                                             | 
                                                        
                    |
| 5 | 26 | 
                                                                 
                                    
                                    13.3%
                                 
                                                             | 
                                                        
                    |
| 6 | 16 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    |
| 7 | 10 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    |
| 8 | 12 | 
                                                                 
                                    
                                    6.1%
                                 
                                                             | 
                                                        
                    |
| 9 | 7 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 20 | 
                                                                 
                                    
                                    10.2%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 187 | |
| Sysmiss | 47 |