| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 124 |
5.2%
|
| 1 | Not very effective | 210 |
8.8%
|
| 2 | Somewhat effective | 1016 |
42.3%
|
| 3 | Very effective | 1012 |
42.2%
|
| 9 | Don't know | 38 |
1.6%
|
| 998 | Refused | 0 |
0%
|