| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 1 |
0.5%
|
|
| 3 | 3 |
1.5%
|
|
| 4 | 6 |
3%
|
|
| 5 | 18 |
9.1%
|
|
| 6 | 18 |
9.1%
|
|
| 7 | 20 |
10.1%
|
|
| 8 | 20 |
10.1%
|
|
| 9 | 15 |
7.6%
|
|
| 10 | Very effective | 21 |
10.6%
|
| 11 | Don't know | 75 |
37.9%
|
| Sysmiss | 28 |