| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Very effective | 519 | 
                                    
                                    43.3%
                                 | 
| 1 | Effective | 559 | 
                                    
                                    46.6%
                                 | 
| 2 | Not very effective | 85 | 
                                    
                                    7.1%
                                 | 
| 3 | Not at all effective | 31 | 
                                    
                                    2.6%
                                 | 
| 9 | Don't Know | 6 | 
                                    
                                    0.5%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |