| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.8%
|
|
| 3 | 2 |
1.5%
|
|
| 4 | 4 |
3%
|
|
| 5 | 13 |
9.8%
|
|
| 6 | 13 |
9.8%
|
|
| 7 | 42 |
31.8%
|
|
| 8 | 48 |
36.4%
|
|
| 9 | 8 |
6.1%
|
|
| 10 | Very effective | 1 |
0.8%
|
| 11 | Don't know | 70 |