| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 658 | 
                                    
                                    14.2%
                                 | 
| 2 | Fairly effective | 1281 | 
                                    
                                    27.6%
                                 | 
| 3 | Fairly ineffective | 1155 | 
                                    
                                    24.9%
                                 | 
| 4 | Very ineffective | 1549 | 
                                    
                                    33.4%
                                 | 
| Sysmiss | 4832 |