| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
2.7%
|
| 2 | 5 |
1.9%
|
|
| 3 | 20 |
7.6%
|
|
| 4 | 18 |
6.9%
|
|
| 5 | 47 |
17.9%
|
|
| 6 | 58 |
22.1%
|
|
| 7 | 38 |
14.5%
|
|
| 8 | 38 |
14.5%
|
|
| 9 | 18 |
6.9%
|
|
| 10 | Very effective | 13 |
5%
|
| 11 | Don't know | 44 |