| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.1%
|
| 2 | 2 |
1.1%
|
|
| 3 | 2 |
1.1%
|
|
| 4 | 3 |
1.6%
|
|
| 5 | 11 |
5.8%
|
|
| 6 | 5 |
2.6%
|
|
| 7 | 18 |
9.5%
|
|
| 8 | 22 |
11.6%
|
|
| 9 | 12 |
6.3%
|
|
| 10 | Very effective | 15 |
7.9%
|
| 11 | Don't know | 96 |
50.5%
|
| Sysmiss | 11 |