| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.5%
|
| 3 | 4 |
0.9%
|
|
| 4 | 8 |
1.8%
|
|
| 5 | 26 |
5.9%
|
|
| 6 | 34 |
7.7%
|
|
| 7 | 50 |
11.3%
|
|
| 8 | 75 |
16.9%
|
|
| 9 | 29 |
6.5%
|
|
| 10 | Very effective | 16 |
3.6%
|
| 11 | Don't know | 0 |
0%
|
| NA | 199 |
44.9%
|