| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.4%
|
|
| 3 | 1 |
0.4%
|
|
| 4 | 1 |
0.4%
|
|
| 5 | 5 |
2.2%
|
|
| 6 | 21 |
9.3%
|
|
| 7 | 37 |
16.4%
|
|
| 8 | 45 |
19.9%
|
|
| 9 | 46 |
20.4%
|
|
| 10 | Very effective | 50 |
22.1%
|
| 11 | Don't know | 19 |
8.4%
|