| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.7%
|
| 2 | 1 |
0.3%
|
|
| 3 | 5 |
1.7%
|
|
| 4 | 8 |
2.7%
|
|
| 5 | 10 |
3.3%
|
|
| 6 | 10 |
3.3%
|
|
| 7 | 18 |
6%
|
|
| 8 | 36 |
12%
|
|
| 9 | 30 |
10%
|
|
| 10 | Very effective | 18 |
6%
|
| 11 | Don't know | 0 |
0%
|
| NA | 159 |
53%
|