| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.3%
|
| 2 | 4 |
1.3%
|
|
| 3 | 10 |
3.2%
|
|
| 4 | 20 |
6.5%
|
|
| 5 | 48 |
15.5%
|
|
| 6 | 33 |
10.7%
|
|
| 7 | 47 |
15.2%
|
|
| 8 | 43 |
13.9%
|
|
| 9 | 22 |
7.1%
|
|
| 10 | Very effective | 11 |
3.6%
|
| 11 | Don't know | 67 |
21.7%
|
| Sysmiss | 59 |