| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 3 |
2%
|
|
| 3 | 2 |
1.4%
|
|
| 4 | 5 |
3.4%
|
|
| 5 | 8 |
5.4%
|
|
| 6 | 9 |
6.1%
|
|
| 7 | 17 |
11.6%
|
|
| 8 | 20 |
13.6%
|
|
| 9 | 19 |
12.9%
|
|
| 10 | Very effective | 11 |
7.5%
|
| 11 | Don't know | 52 |
35.4%
|
| Sysmiss | 10 |