| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 |
0.5%
|
|
| 3 | 8 |
2.1%
|
|
| 4 | 20 |
5.3%
|
|
| 5 | 53 |
14.1%
|
|
| 6 | 70 |
18.6%
|
|
| 7 | 70 |
18.6%
|
|
| 8 | 63 |
16.8%
|
|
| 9 | 58 |
15.4%
|
|
| 10 | Very effective | 32 |
8.5%
|
| 11 | Don't know | 27 | |
| Sysmiss | 20 |