| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 2 | 1 |
0.2%
|
|
| 3 | 3 |
0.7%
|
|
| 4 | 10 |
2.3%
|
|
| 5 | 24 |
5.4%
|
|
| 6 | 34 |
7.7%
|
|
| 7 | 66 |
14.9%
|
|
| 8 | 92 |
20.8%
|
|
| 9 | 28 |
6.3%
|
|
| 10 | Very effective | 4 |
0.9%
|
| 11 | Don't know | 0 |
0%
|
| NA | 180 |
40.6%
|