| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1339 |
7.1%
|
| 2 | Effective | 4945 |
26.3%
|
| 3 | Moderately effective | 5595 |
29.8%
|
| 4 | Poorly effective | 4256 |
22.6%
|
| 5 | Not effective at all | 2659 |
14.1%
|