| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1669 |
56.8%
|
| 2 | Fairly effective | 809 |
27.5%
|
| 3 | Fairly ineffective | 242 |
8.2%
|
| 4 | Very ineffective | 220 |
7.5%
|
| Sysmiss | 610 |