| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 |
1.2%
|
|
| 3 | 2 |
1.2%
|
|
| 4 | 4 |
2.4%
|
|
| 5 | 10 |
6.1%
|
|
| 6 | 12 |
7.3%
|
|
| 7 | 24 |
14.6%
|
|
| 8 | 31 |
18.9%
|
|
| 9 | 46 |
28%
|
|
| 10 | Very effective | 33 |
20.1%
|
| 11 | Don't know | 37 | |
| Sysmiss | 1 |