| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.9%
|
| 2 | 4 |
1.2%
|
|
| 3 | 11 |
3.3%
|
|
| 4 | 16 |
4.9%
|
|
| 5 | 38 |
11.6%
|
|
| 6 | 62 |
18.8%
|
|
| 7 | 41 |
12.5%
|
|
| 8 | 23 |
7%
|
|
| 9 | 14 |
4.3%
|
|
| 10 | Very effective | 22 |
6.7%
|
| 11 | Don't know | 95 |
28.9%
|
| Sysmiss | 25 |