| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effectively at all | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 2 | 6 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 3 | 14 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 4 | 31 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 5 | 66 | 
                                                                 
                                    
                                    16.3%
                                 
                                                             | 
                                                        
                    |
| 6 | 76 | 
                                                                 
                                    
                                    18.8%
                                 
                                                             | 
                                                        
                    |
| 7 | 84 | 
                                                                 
                                    
                                    20.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 69 | 
                                                                 
                                    
                                    17%
                                 
                                                             | 
                                                        
                    |
| 9 | 32 | 
                                                                 
                                    
                                    7.9%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effectively | 25 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    
| -99 | 36 | ||
| 11 | Don't know | 97 | |
| Sysmiss | 119 |