| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
2.8%
|
| 2 | 8 |
2.8%
|
|
| 3 | 16 |
5.6%
|
|
| 4 | 22 |
7.7%
|
|
| 5 | 53 |
18.6%
|
|
| 6 | 57 |
20%
|
|
| 7 | 41 |
14.4%
|
|
| 8 | 43 |
15.1%
|
|
| 9 | 22 |
7.7%
|
|
| 10 | Very effective | 15 |
5.3%
|
| 11 | Don't know | 21 |