| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 0 |
0%
|
|
| 3 | 2 |
1%
|
|
| 4 | 11 |
5.4%
|
|
| 5 | 3 |
1.5%
|
|
| 6 | 18 |
8.8%
|
|
| 7 | 24 |
11.7%
|
|
| 8 | 25 |
12.2%
|
|
| 9 | 12 |
5.9%
|
|
| 10 | Very effective | 17 |
8.3%
|
| 11 | Don't know | 92 |
44.9%
|
| Sysmiss | 21 |