| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
4.7%
|
| 2 | 4 |
6.3%
|
|
| 3 | 5 |
7.8%
|
|
| 4 | 8 |
12.5%
|
|
| 5 | 12 |
18.8%
|
|
| 6 | 7 |
10.9%
|
|
| 7 | 5 |
7.8%
|
|
| 8 | 10 |
15.6%
|
|
| 9 | 4 |
6.3%
|
|
| 10 | Very effective | 6 |
9.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 142 |