| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1%
|
| 2 | 1 |
0.5%
|
|
| 3 | 2 |
1%
|
|
| 4 | 11 |
5.4%
|
|
| 5 | 9 |
4.4%
|
|
| 6 | 15 |
7.4%
|
|
| 7 | 16 |
7.9%
|
|
| 8 | 18 |
8.9%
|
|
| 9 | 10 |
4.9%
|
|
| 10 | Very effective | 16 |
7.9%
|
| 11 | Don't know | 103 |
50.7%
|
| Sysmiss | 23 |