| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 2 |
0.2%
|
| 0 | Not at all effective | 84 |
7%
|
| 1 | Not very effective | 84 |
7%
|
| 2 | Somewhat effective | 268 |
22.4%
|
| 3 | Very effective | 745 |
62.1%
|
| 9 | Don't know/ haven't heard enough | 16 |
1.3%
|
| 98 | Refused | 0 |
0%
|