| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.3%
|
| 2 | 5 |
4.1%
|
|
| 3 | 4 |
3.3%
|
|
| 4 | 2 |
1.7%
|
|
| 5 | 11 |
9.1%
|
|
| 6 | 5 |
4.1%
|
|
| 7 | 11 |
9.1%
|
|
| 8 | 13 |
10.7%
|
|
| 9 | 13 |
10.7%
|
|
| 10 | Very effective | 9 |
7.4%
|
| 11 | Don't know | 44 |
36.4%
|