| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 1 |
0.8%
|
|
| 3 | 5 |
4.1%
|
|
| 4 | 1 |
0.8%
|
|
| 5 | 12 |
9.8%
|
|
| 6 | 21 |
17.2%
|
|
| 7 | 38 |
31.1%
|
|
| 8 | 23 |
18.9%
|
|
| 9 | 11 |
9%
|
|
| 10 | Very effective | 9 |
7.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 40 |