| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 2 | 3 |
0.7%
|
|
| 3 | 5 |
1.1%
|
|
| 4 | 8 |
1.8%
|
|
| 5 | 13 |
2.9%
|
|
| 6 | 30 |
6.8%
|
|
| 7 | 76 |
17.2%
|
|
| 8 | 96 |
21.7%
|
|
| 9 | 51 |
11.5%
|
|
| 10 | Very effective | 14 |
3.2%
|
| 11 | Don't know | 0 |
0%
|
| NA | 146 |
33%
|