| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.9%
|
| 2 | 4 |
3.7%
|
|
| 3 | 6 |
5.6%
|
|
| 4 | 6 |
5.6%
|
|
| 5 | 12 |
11.1%
|
|
| 6 | 7 |
6.5%
|
|
| 7 | 20 |
18.5%
|
|
| 8 | 30 |
27.8%
|
|
| 9 | 17 |
15.7%
|
|
| 10 | Very effective | 5 |
4.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 267 |