| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 6 |
2.8%
|
|
| 3 | 1 |
0.5%
|
|
| 4 | 4 |
1.8%
|
|
| 5 | 11 |
5.1%
|
|
| 6 | 29 |
13.4%
|
|
| 7 | 40 |
18.4%
|
|
| 8 | 17 |
7.8%
|
|
| 9 | 24 |
11.1%
|
|
| 10 | Very effective | 13 |
6%
|
| 11 | Don't know | 70 |
32.3%
|
| Sysmiss | 3 |