| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.2%
|
| 2 | 4 |
0.9%
|
|
| 3 | 11 |
2.5%
|
|
| 4 | 8 |
1.8%
|
|
| 5 | 19 |
4.3%
|
|
| 6 | 31 |
7%
|
|
| 7 | 77 |
17.4%
|
|
| 8 | 93 |
21%
|
|
| 9 | 44 |
9.9%
|
|
| 10 | Very effective | 17 |
3.8%
|
| 11 | Don't know | 0 |
0%
|
| NA | 138 |
31.2%
|