| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
3.7%
|
| 2 | 8 |
5%
|
|
| 3 | 8 |
5%
|
|
| 4 | 7 |
4.3%
|
|
| 5 | 17 |
10.6%
|
|
| 6 | 17 |
10.6%
|
|
| 7 | 17 |
10.6%
|
|
| 8 | 22 |
13.7%
|
|
| 9 | 26 |
16.1%
|
|
| 10 | Very effective | 33 |
20.5%
|
| 11 | NA | 0 |
0%
|
| 12 | Don't know | 0 |
0%
|
| Sysmiss | 171 |