| Value | Category | Cases | |
|---|---|---|---|
| 1 | Highly effective | 6529 |
33.7%
|
| 2 | Effective | 6856 |
35.3%
|
| 3 | Moderately effective | 2795 |
14.4%
|
| 4 | Not effective | 1130 |
5.8%
|
| 5 | Don't know | 2087 |
10.8%
|