| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
4.5%
|
| 2 | 4 |
2.3%
|
|
| 3 | 10 |
5.7%
|
|
| 4 | 13 |
7.4%
|
|
| 5 | 23 |
13.1%
|
|
| 6 | 20 |
11.4%
|
|
| 7 | 26 |
14.8%
|
|
| 8 | 19 |
10.8%
|
|
| 9 | 13 |
7.4%
|
|
| 10 | Very effective | 5 |
2.8%
|
| 11 | Don't know | 35 |
19.9%
|
| Sysmiss | 4 |