| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
7.8%
|
| 2 | 7 |
6.8%
|
|
| 3 | 10 |
9.7%
|
|
| 4 | 6 |
5.8%
|
|
| 5 | 7 |
6.8%
|
|
| 6 | 8 |
7.8%
|
|
| 7 | 16 |
15.5%
|
|
| 8 | 5 |
4.9%
|
|
| 9 | 11 |
10.7%
|
|
| 10 | Very effective | 25 |
24.3%
|
| 11 | Don't know | 45 | |
| Sysmiss | 32 |