| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 92 |
7.7%
|
| 1 | Not very effective | 271 |
22.6%
|
| 2 | Somewhat effective | 525 |
43.8%
|
| 3 | Very effective | 300 |
25%
|
| 9 | Don't know | 12 |
1%
|
| 98 | Refused | 0 |
0%
|