| Value | Category | Cases | |
|---|---|---|---|
| 1 | Highly effective | 1793 |
9.5%
|
| 2 | Effective | 4984 |
26.4%
|
| 3 | Moderately effective | 3798 |
20.1%
|
| 4 | Not effective | 3412 |
18.1%
|
| 5 | Don't know | 4909 |
26%
|