| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 82 |
6.8%
|
| 1 | Not very effective | 80 |
6.7%
|
| 2 | Somewhat effective | 247 |
20.6%
|
| 3 | Very effective | 767 |
63.9%
|
| 9 | Don't Know | 21 |
1.8%
|
| 98 | Refused | 3 |
0.3%
|