| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.8%
|
| 2 | 1 |
1.4%
|
|
| 3 | 4 |
5.6%
|
|
| 4 | 2 |
2.8%
|
|
| 5 | 9 |
12.5%
|
|
| 6 | 8 |
11.1%
|
|
| 7 | 12 |
16.7%
|
|
| 8 | 17 |
23.6%
|
|
| 9 | 13 |
18.1%
|
|
| 10 | Very effective | 4 |
5.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 35 |