| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.3%
|
| 2 | 2 |
1.3%
|
|
| 3 | 9 |
5.6%
|
|
| 4 | 11 |
6.9%
|
|
| 5 | 18 |
11.3%
|
|
| 6 | 23 |
14.4%
|
|
| 7 | 27 |
16.9%
|
|
| 8 | 44 |
27.5%
|
|
| 9 | 12 |
7.5%
|
|
| 10 | Very effective | 12 |
7.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 50 |