| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
0.9%
|
| 2 | 6 |
1.4%
|
|
| 3 | 6 |
1.4%
|
|
| 4 | 8 |
1.8%
|
|
| 5 | 25 |
5.6%
|
|
| 6 | 36 |
8.1%
|
|
| 7 | 63 |
14.2%
|
|
| 8 | 68 |
15.3%
|
|
| 9 | 34 |
7.7%
|
|
| 10 | Very effective | 3 |
0.7%
|
| 11 | Don't know | 0 |
0%
|
| NA | 190 |
42.9%
|