| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 854 |
30.4%
|
| 2 | Fairly effective | 1194 |
42.6%
|
| 3 | Fairly ineffective | 430 |
15.3%
|
| 4 | Very ineffective | 328 |
11.7%
|
| Sysmiss | 744 |