| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 2 |
1.5%
|
|
| 3 | 1 |
0.7%
|
|
| 4 | 9 |
6.7%
|
|
| 5 | 18 |
13.3%
|
|
| 6 | 19 |
14.1%
|
|
| 7 | 27 |
20%
|
|
| 8 | 18 |
13.3%
|
|
| 9 | 21 |
15.6%
|
|
| 10 | Very effective | 19 |
14.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 31 |