| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.7%
|
| 2 | 1 |
0.3%
|
|
| 3 | 3 |
1%
|
|
| 4 | 6 |
2%
|
|
| 5 | 16 |
5.3%
|
|
| 6 | 17 |
5.7%
|
|
| 7 | 38 |
12.7%
|
|
| 8 | 48 |
16%
|
|
| 9 | 24 |
8%
|
|
| 10 | Very effective | 3 |
1%
|
| 11 | Don't know | 0 |
0%
|
| NA | 139 |
46.3%
|