| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1439 |
7.5%
|
| 2 | Effective | 5325 |
27.6%
|
| 3 | Moderate | 5950 |
30.8%
|
| 4 | Not effective | 3113 |
16.1%
|
| 5 | Don't know | 3486 |
18.1%
|