| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 3 |
0.7%
|
|
| 3 | 3 |
0.7%
|
|
| 4 | 7 |
1.6%
|
|
| 5 | 14 |
3.2%
|
|
| 6 | 36 |
8.1%
|
|
| 7 | 61 |
13.8%
|
|
| 8 | 81 |
18.3%
|
|
| 9 | 34 |
7.7%
|
|
| 10 | Very effective | 11 |
2.5%
|
| 11 | Don't know | 0 |
0%
|
| NA | 191 |
43.1%
|