| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Not at all effective | 68 |
5.6%
|
| 1 | Not very effective | 421 |
35%
|
| 2 | Somewhat effective | 515 |
42.8%
|
| 3 | Very effective | 99 |
8.2%
|
| 9 | Don't know | 101 |
8.4%
|
| 998 | Refused | 0 |
0%
|