| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 592 |
22.6%
|
| 2 | Fairly effective | 1095 |
41.7%
|
| 3 | Fairly ineffective | 542 |
20.6%
|
| 4 | Very ineffective | 396 |
15.1%
|
| Sysmiss | 925 |