| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 9 |
3.4%
|
| 2 | 11 |
4.2%
|
|
| 3 | 25 |
9.5%
|
|
| 4 | 18 |
6.9%
|
|
| 5 | 56 |
21.4%
|
|
| 6 | 48 |
18.3%
|
|
| 7 | 32 |
12.2%
|
|
| 8 | 38 |
14.5%
|
|
| 9 | 13 |
5%
|
|
| 10 | Very effective | 12 |
4.6%
|
| 11 | Don't know | 44 |