| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1487 |
8%
|
| 2 | Effective | 4816 |
26%
|
| 3 | Moderately effective | 5509 |
29.7%
|
| 4 | Poorly effective | 4033 |
21.8%
|
| 5 | Not effective at all | 2694 |
14.5%
|