| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 5 |
4%
|
|
| 3 | 6 |
4.8%
|
|
| 4 | 14 |
11.2%
|
|
| 5 | 16 |
12.8%
|
|
| 6 | 18 |
14.4%
|
|
| 7 | 20 |
16%
|
|
| 8 | 26 |
20.8%
|
|
| 9 | 16 |
12.8%
|
|
| 10 | Very effective | 3 |
2.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 250 |