| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
0.9%
|
| 2 | 16 |
3.5%
|
|
| 3 | 28 |
6.1%
|
|
| 4 | 35 |
7.6%
|
|
| 5 | 75 |
16.4%
|
|
| 6 | 76 |
16.6%
|
|
| 7 | 75 |
16.4%
|
|
| 8 | 83 |
18.1%
|
|
| 9 | 50 |
10.9%
|
|
| 10 | Very effective | 16 |
3.5%
|
| 11 | Don't know | 33 | |
| Sysmiss | 14 |