| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 0 |
0%
|
|
| 3 | 2 |
1%
|
|
| 4 | 5 |
2.5%
|
|
| 5 | 16 |
8%
|
|
| 6 | 11 |
5.5%
|
|
| 7 | 24 |
12.1%
|
|
| 8 | 29 |
14.6%
|
|
| 9 | 12 |
6%
|
|
| 10 | Very effective | 27 |
13.6%
|
| 11 | Don't know | 72 |
36.2%
|
| Sysmiss | 27 |