| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.1%
|
| 2 | 3 |
3.4%
|
|
| 3 | 4 |
4.6%
|
|
| 4 | 8 |
9.2%
|
|
| 5 | 7 |
8%
|
|
| 6 | 10 |
11.5%
|
|
| 7 | 21 |
24.1%
|
|
| 8 | 24 |
27.6%
|
|
| 9 | 6 |
6.9%
|
|
| 10 | Very effective | 3 |
3.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 123 |