| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.8%
|
| 2 | 3 |
2.8%
|
|
| 3 | 5 |
4.7%
|
|
| 4 | 6 |
5.6%
|
|
| 5 | 13 |
12.1%
|
|
| 6 | 10 |
9.3%
|
|
| 7 | 20 |
18.7%
|
|
| 8 | 15 |
14%
|
|
| 9 | 9 |
8.4%
|
|
| 10 | Very effective | 9 |
8.4%
|
| 11 | Don't know | 14 |
13.1%
|