| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.3%
|
| 2 | 2 |
1.7%
|
|
| 3 | 7 |
5.8%
|
|
| 4 | 6 |
5%
|
|
| 5 | 7 |
5.8%
|
|
| 6 | 10 |
8.3%
|
|
| 7 | 10 |
8.3%
|
|
| 8 | 14 |
11.6%
|
|
| 9 | 9 |
7.4%
|
|
| 10 | Very effective | 6 |
5%
|
| 11 | Don't know | 46 |
38%
|