| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1517 |
7.8%
|
| 2 | Effective | 4861 |
25.1%
|
| 3 | Moderate effecti | 5093 |
26.3%
|
| 4 | Not effective | 3513 |
18.2%
|
| 5 | Don't know | 4350 |
22.5%
|