| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 3 |
0.7%
|
|
| 3 | 3 |
0.7%
|
|
| 4 | 9 |
2%
|
|
| 5 | 16 |
3.6%
|
|
| 6 | 35 |
7.9%
|
|
| 7 | 63 |
14.2%
|
|
| 8 | 76 |
17.2%
|
|
| 9 | 34 |
7.7%
|
|
| 10 | Very effective | 7 |
1.6%
|
| 11 | Don't know | 0 |
0%
|
| NA | 195 |
44%
|