| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 3 | 4 |
0.9%
|
|
| 4 | 10 |
2.3%
|
|
| 5 | 21 |
4.7%
|
|
| 6 | 35 |
7.9%
|
|
| 7 | 55 |
12.4%
|
|
| 8 | 84 |
19%
|
|
| 9 | 41 |
9.3%
|
|
| 10 | Very effective | 6 |
1.4%
|
| 11 | Don't know | 0 |
0%
|
| NA | 186 |
42%
|