| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 3201 |
16.5%
|
| 2 | Effective | 6695 |
34.5%
|
| 3 | Moderate effecti | 4686 |
24.1%
|
| 4 | Not effective | 1812 |
9.3%
|
| 5 | Don't know | 3014 |
15.5%
|