| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Very effective | 463 | 
                                    
                                    38.6%
                                 | 
| 1 | Effective | 527 | 
                                    
                                    43.9%
                                 | 
| 2 | Not very effective | 114 | 
                                    
                                    9.5%
                                 | 
| 3 | Not at all effective | 54 | 
                                    
                                    4.5%
                                 | 
| 9 | Don't Know | 42 | 
                                    
                                    3.5%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |