| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 72 |
3%
|
| 1 | Not very effective | 352 |
14.7%
|
| 2 | Somewhat effective | 1017 |
42.4%
|
| 3 | Very effective | 713 |
29.7%
|
| 9 | Don't know | 246 |
10.3%
|
| 98 | Refused | 0 |
0%
|