| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 69 |
2.9%
|
| 1 | Not very effective | 334 |
14%
|
| 2 | Somewhat effective | 1314 |
55.1%
|
| 3 | Very effective | 520 |
21.8%
|
| 9 | Don't know | 149 |
6.2%
|
| 98 | Refused | 0 |
0%
|