| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.8%
|
| 2 | 0 |
0%
|
|
| 3 | 3 |
1.8%
|
|
| 4 | 6 |
3.6%
|
|
| 5 | 13 |
7.8%
|
|
| 6 | 16 |
9.6%
|
|
| 7 | 28 |
16.8%
|
|
| 8 | 30 |
18%
|
|
| 9 | 8 |
4.8%
|
|
| 10 | Very effective | 9 |
5.4%
|
| 11 | Don't know | 51 |
30.5%
|
| Sysmiss | 19 |