| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 82 |
6.8%
|
| 1 | Not very effective | 296 |
24.7%
|
| 2 | Somewhat effective | 338 |
28.2%
|
| 3 | Very effective | 334 |
27.8%
|
| 9 | Don't know | 150 |
12.5%
|
| 98 | Refused | 0 |
0%
|