| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 7 |
3.5%
|
| 2 | 6 |
3%
|
|
| 3 | 8 |
4%
|
|
| 4 | 16 |
7.9%
|
|
| 5 | 24 |
11.9%
|
|
| 6 | 26 |
12.9%
|
|
| 7 | 27 |
13.4%
|
|
| 8 | 21 |
10.4%
|
|
| 9 | 17 |
8.4%
|
|
| 10 | Very effective | 0 |
0%
|
| 11 | Don't know | 49 |
24.3%
|
| Sysmiss | 23 |