| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 2 |
1.1%
|
|
| 3 | 8 |
4.5%
|
|
| 4 | 10 |
5.6%
|
|
| 5 | 31 |
17.4%
|
|
| 6 | 20 |
11.2%
|
|
| 7 | 34 |
19.1%
|
|
| 8 | 33 |
18.5%
|
|
| 9 | 16 |
9%
|
|
| 10 | Very effective | 23 |
12.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 82 |