| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1%
|
| 2 | 1 |
0.5%
|
|
| 3 | 9 |
4.4%
|
|
| 4 | 8 |
3.9%
|
|
| 5 | 15 |
7.3%
|
|
| 6 | 31 |
15%
|
|
| 7 | 33 |
16%
|
|
| 8 | 32 |
15.5%
|
|
| 9 | 38 |
18.4%
|
|
| 10 | Very effective | 37 |
18%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 149 |