| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.4%
|
| 2 | 2 |
2.9%
|
|
| 3 | 2 |
2.9%
|
|
| 4 | 5 |
7.1%
|
|
| 5 | 7 |
10%
|
|
| 6 | 10 |
14.3%
|
|
| 7 | 13 |
18.6%
|
|
| 8 | 20 |
28.6%
|
|
| 9 | 9 |
12.9%
|
|
| 10 | Very effective | 1 |
1.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 71 |