| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 419 |
17.2%
|
| 2 | Fairly effective | 717 |
29.4%
|
| 3 | Fairly ineffective | 648 |
26.5%
|
| 4 | Very ineffective | 657 |
26.9%
|
| Sysmiss | 1109 |