| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 4 |
0.3%
|
| 0 | Not at all effective | 445 |
37.1%
|
| 1 | Not very effective | 318 |
26.5%
|
| 2 | Somewhat effective | 240 |
20%
|
| 3 | Very effective | 123 |
10.3%
|
| 9 | Don't know/ haven't heard enough | 69 |
5.8%
|
| 98 | Refused | 0 |
0%
|