| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.4%
|
| 2 | 1 |
0.8%
|
|
| 3 | 2 |
1.6%
|
|
| 4 | 11 |
8.8%
|
|
| 5 | 22 |
17.6%
|
|
| 6 | 20 |
16%
|
|
| 7 | 27 |
21.6%
|
|
| 8 | 16 |
12.8%
|
|
| 9 | 17 |
13.6%
|
|
| 10 | Very effective | 6 |
4.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 66 |