| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Not at all effective | 262 |
21.9%
|
| 1 | Not very effective | 418 |
34.9%
|
| 2 | Somewhat effective | 346 |
28.9%
|
| 3 | Very effective | 146 |
12.2%
|
| 9 | Don't know/ haven't heard enough | 26 |
2.2%
|
| 98 | Refused | 0 |
0%
|