| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.6%
|
|
| 3 | 1 |
0.6%
|
|
| 4 | 4 |
2.6%
|
|
| 5 | 12 |
7.7%
|
|
| 6 | 9 |
5.8%
|
|
| 7 | 31 |
20%
|
|
| 8 | 33 |
21.3%
|
|
| 9 | 17 |
11%
|
|
| 10 | Very effective | 22 |
14.2%
|
| 11 | Don't know | 25 |
16.1%
|