| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 120 |
10%
|
| 1 | Not very effective | 353 |
29.4%
|
| 2 | Somewhat effective | 431 |
35.9%
|
| 3 | Very effective | 163 |
13.6%
|
| 9 | Don't know | 133 |
11.1%
|
| 998 | Refused | 0 |
0%
|