| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 3 | 2 |
0.5%
|
|
| 4 | 7 |
1.6%
|
|
| 5 | 17 |
3.8%
|
|
| 6 | 21 |
4.7%
|
|
| 7 | 54 |
12.2%
|
|
| 8 | 82 |
18.5%
|
|
| 9 | 40 |
9%
|
|
| 10 | Very effective | 6 |
1.4%
|
| 11 | Don't know | 0 |
0%
|
| NA | 213 |
48.1%
|