| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 9 |
9.1%
|
| 2 | 9 |
9.1%
|
|
| 3 | 4 |
4%
|
|
| 4 | 5 |
5.1%
|
|
| 5 | 9 |
9.1%
|
|
| 6 | 4 |
4%
|
|
| 7 | 10 |
10.1%
|
|
| 8 | 11 |
11.1%
|
|
| 9 | 8 |
8.1%
|
|
| 10 | Very effective | 30 |
30.3%
|
| 11 | Don't know | 50 | |
| Sysmiss | 31 |