| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 486 |
19.2%
|
| 2 | Fairly effective | 1161 |
45.9%
|
| 3 | Fairly ineffective | 541 |
21.4%
|
| 4 | Very ineffective | 342 |
13.5%
|
| Sysmiss | 1020 |