| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Very effective | 518 | 
                                    
                                    43.2%
                                 | 
| 1 | Effective | 446 | 
                                    
                                    37.2%
                                 | 
| 2 | Not very effective | 146 | 
                                    
                                    12.2%
                                 | 
| 3 | Not at all effective | 72 | 
                                    
                                    6%
                                 | 
| 9 | Don't Know | 18 | 
                                    
                                    1.5%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |