| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 11 |
5.1%
|
|
| 3 | 17 |
7.9%
|
|
| 4 | 25 |
11.7%
|
|
| 5 | 30 |
14%
|
|
| 6 | 37 |
17.3%
|
|
| 7 | 22 |
10.3%
|
|
| 8 | 20 |
9.3%
|
|
| 9 | 9 |
4.2%
|
|
| 10 | Very effective | 14 |
6.5%
|
| 11 | Don't know | 25 |
11.7%
|
| Sysmiss | 11 |