| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 2 | 1 |
0.2%
|
|
| 3 | 6 |
1.4%
|
|
| 4 | 11 |
2.5%
|
|
| 5 | 13 |
2.9%
|
|
| 6 | 32 |
7.2%
|
|
| 7 | 62 |
14%
|
|
| 8 | 90 |
20.3%
|
|
| 9 | 44 |
9.9%
|
|
| 10 | Very effective | 12 |
2.7%
|
| 11 | Don't know | 0 |
0%
|
| NA | 171 |
38.6%
|