| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.5%
|
| 2 | 6 |
1.9%
|
|
| 3 | 8 |
2.5%
|
|
| 4 | 23 |
7.1%
|
|
| 5 | 47 |
14.5%
|
|
| 6 | 47 |
14.5%
|
|
| 7 | 36 |
11.1%
|
|
| 8 | 34 |
10.5%
|
|
| 9 | 18 |
5.6%
|
|
| 10 | Very effective | 20 |
6.2%
|
| 11 | Don't know | 80 |
24.7%
|
| Sysmiss | 30 |