| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 677 |
13.8%
|
| 2 | Fairly effective | 2037 |
41.5%
|
| 3 | Fairly ineffective | 1088 |
22.1%
|
| 4 | Very ineffective | 1110 |
22.6%
|
| Sysmiss | 4563 |