| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 71 |
6.3%
|
| 1 | Not very effective | 253 |
22.6%
|
| 2 | Somewhat effective | 487 |
43.5%
|
| 3 | Very effective | 277 |
24.7%
|
| 8 | Refused to answer | 3 |
0.3%
|
| 9 | Don’t know | 29 |
2.6%
|