| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 598 |
50.2%
|
| 1 | Not very effective | 99 |
8.3%
|
| 2 | Somewhat effective | 94 |
7.9%
|
| 3 | Very effective | 133 |
11.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 267 |
22.4%
|