| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.8%
|
| 2 | 8 |
3.6%
|
|
| 3 | 2 |
0.9%
|
|
| 4 | 11 |
4.9%
|
|
| 5 | 17 |
7.6%
|
|
| 6 | 13 |
5.8%
|
|
| 7 | 19 |
8.5%
|
|
| 8 | 10 |
4.5%
|
|
| 9 | 6 |
2.7%
|
|
| 10 | Very effective | 6 |
2.7%
|
| 11 | Don't know | 127 |
57%
|
| Sysmiss | 14 |