| Value | Category | Cases | |
|---|---|---|---|
| 1 | Highly effective | 3289 |
17.1%
|
| 2 | Effective | 6579 |
34.1%
|
| 3 | Moderately effective | 4182 |
21.7%
|
| 4 | Not effective | 2189 |
11.4%
|
| 5 | Don't know | 3046 |
15.8%
|