| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.7%
|
|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 1 |
0.7%
|
|
| 3 | 4 |
3%
|
|
| 4 | 11 |
8.2%
|
|
| 5 | 22 |
16.4%
|
|
| 6 | 19 |
14.2%
|
|
| 7 | 18 |
13.4%
|
|
| 8 | 5 |
3.7%
|
|
| 9 | 8 |
6%
|
|
| 10 | Very effective | 11 |
8.2%
|
| 11 | Don't know | 33 |
24.6%
|