| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 0 |
0%
|
|
| 3 | 0 |
0%
|
|
| 4 | 2 |
1%
|
|
| 5 | 5 |
2.5%
|
|
| 6 | 5 |
2.5%
|
|
| 7 | 19 |
9.5%
|
|
| 8 | 35 |
17.4%
|
|
| 9 | 25 |
12.4%
|
|
| 10 | Very effective | 27 |
13.4%
|
| 11 | Don't know | 82 |
40.8%
|
| Sysmiss | 25 |