| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 2 | 3 |
0.7%
|
|
| 4 | 6 |
1.4%
|
|
| 5 | 21 |
4.7%
|
|
| 6 | 38 |
8.6%
|
|
| 7 | 69 |
15.6%
|
|
| 8 | 74 |
16.7%
|
|
| 9 | 22 |
5%
|
|
| 10 | Very effective | 2 |
0.5%
|
| 11 | Don't know | 0 |
0%
|
| NA | 207 |
46.7%
|