| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 |
0.5%
|
|
| 3 | 4 |
1%
|
|
| 4 | 15 |
3.9%
|
|
| 5 | 42 |
10.9%
|
|
| 6 | 89 |
23.2%
|
|
| 7 | 75 |
19.5%
|
|
| 8 | 65 |
16.9%
|
|
| 9 | 60 |
15.6%
|
|
| 10 | Very effective | 32 |
8.3%
|
| 11 | Don't know | 21 | |
| Sysmiss | 18 |