| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 175 |
14.6%
|
| 1 | Not very effective | 407 |
33.9%
|
| 2 | Somewhat effective | 425 |
35.4%
|
| 3 | Very effective | 74 |
6.2%
|
| 9 | Don't know | 119 |
9.9%
|
| 98 | Refused | 0 |
0%
|