| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 1 |
0.6%
|
|
| 3 | 13 |
8.3%
|
|
| 4 | 7 |
4.5%
|
|
| 5 | 33 |
21%
|
|
| 6 | 49 |
31.2%
|
|
| 7 | 29 |
18.5%
|
|
| 8 | 13 |
8.3%
|
|
| 9 | 9 |
5.7%
|
|
| 10 | Very effective | 2 |
1.3%
|
| 11 | Don't know | 14 | |
| Sysmiss | 32 |