| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 2 |
1.1%
|
|
| 3 | 4 |
2.2%
|
|
| 4 | 7 |
3.8%
|
|
| 5 | 11 |
6%
|
|
| 6 | 15 |
8.2%
|
|
| 7 | 40 |
22%
|
|
| 8 | 42 |
23.1%
|
|
| 9 | 34 |
18.7%
|
|
| 10 | Very effective | 10 |
5.5%
|
| 11 | Don't know | 16 |
8.8%
|
| Sysmiss | 83 |