| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1515 |
7.9%
|
| 2 | Effective | 5084 |
26.5%
|
| 3 | Moderate effecti | 4875 |
25.4%
|
| 4 | Not effective | 2921 |
15.2%
|
| 5 | Don't know | 4774 |
24.9%
|