| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1%
|
| 2 | 2 |
1%
|
|
| 3 | 7 |
3.6%
|
|
| 4 | 5 |
2.6%
|
|
| 5 | 15 |
7.8%
|
|
| 6 | 13 |
6.8%
|
|
| 7 | 17 |
8.9%
|
|
| 8 | 19 |
9.9%
|
|
| 9 | 7 |
3.6%
|
|
| 10 | Very effective | 1 |
0.5%
|
| 11 | Don't know | 104 |
54.2%
|
| Sysmiss | 11 |