| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 98 |
8.2%
|
| 1 | Not very effective | 251 |
21.1%
|
| 2 | Somewhat effective | 219 |
18.4%
|
| 3 | Very effective | 286 |
24%
|
| 9 | Don't know | 337 |
28.3%
|
| 98 | Refused | 0 |
0%
|