| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 - Not effective at all | 2 |
0.8%
|
| 2 | 2 | 5 |
1.9%
|
| 3 | 3 | 13 |
5%
|
| 4 | 4 | 17 |
6.6%
|
| 5 | 5 | 34 |
13.2%
|
| 6 | 6 | 38 |
14.7%
|
| 7 | 7 | 43 |
16.7%
|
| 8 | 8 | 33 |
12.8%
|
| 9 | 9 | 8 |
3.1%
|
| 10 | 10 - Very effective | 11 |
4.3%
|
| 11 | Don't know | 54 |
20.9%
|