| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
0.9%
|
| 2 | 1 |
0.2%
|
|
| 3 | 8 |
1.8%
|
|
| 4 | 10 |
2.3%
|
|
| 5 | 24 |
5.4%
|
|
| 6 | 31 |
7%
|
|
| 7 | 56 |
12.6%
|
|
| 8 | 94 |
21.2%
|
|
| 9 | 55 |
12.4%
|
|
| 10 | Very effective | 12 |
2.7%
|
| 11 | Don't know | 0 |
0%
|
| NA | 148 |
33.4%
|