| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.5%
|
| 2 | 3 |
4.4%
|
|
| 4 | 1 |
1.5%
|
|
| 5 | 1 |
1.5%
|
|
| 6 | 9 |
13.2%
|
|
| 7 | 11 |
16.2%
|
|
| 8 | 11 |
16.2%
|
|
| 9 | 19 |
27.9%
|
|
| 10 | Very effective | 12 |
17.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 96 |