| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 87 |
7.3%
|
| 1 | Not very effective | 329 |
27.4%
|
| 2 | Somewhat effective | 501 |
41.8%
|
| 3 | Very effective | 153 |
12.8%
|
| 9 | Don't know | 130 |
10.8%
|
| 98 | Refused | 0 |
0%
|