| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Very effective | 474 | 
                                    
                                    39.5%
                                 | 
| 1 | Effective | 558 | 
                                    
                                    46.5%
                                 | 
| 2 | Not very effective | 119 | 
                                    
                                    9.9%
                                 | 
| 3 | Not at all effective | 45 | 
                                    
                                    3.8%
                                 | 
| 9 | Don't Know | 4 | 
                                    
                                    0.3%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |