| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 1595 |
8.1%
|
| 2 | Effective | 6912 |
35.2%
|
| 3 | Not effective | 7422 |
37.8%
|
| 4 | Don't know | 3703 |
18.9%
|
| 5 | 1 |
0%
|
|
| Sysmiss | 165 |