| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Very effective | 485 | 
                                    
                                    40.4%
                                 | 
| 1 | Effective | 567 | 
                                    
                                    47.3%
                                 | 
| 2 | Not very effective | 95 | 
                                    
                                    7.9%
                                 | 
| 3 | Not at all effective | 38 | 
                                    
                                    3.2%
                                 | 
| 9 | Don't Know | 15 | 
                                    
                                    1.3%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |