| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1123 |
41.5%
|
| 2 | Fairly effective | 1049 |
38.8%
|
| 3 | Fairly ineffective | 317 |
11.7%
|
| 4 | Very ineffective | 214 |
7.9%
|
| Sysmiss | 847 |