| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 2925 |
15.1%
|
| 2 | Effective | 6526 |
33.8%
|
| 3 | Moderate | 4458 |
23.1%
|
| 4 | Not effective | 1963 |
10.2%
|
| 5 | Don't know | 3461 |
17.9%
|