| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.9%
|
|
| 1 | Not effective at all | 2 |
0.9%
|
| 2 | 2 |
0.9%
|
|
| 3 | 4 |
1.9%
|
|
| 4 | 7 |
3.2%
|
|
| 5 | 24 |
11.1%
|
|
| 6 | 15 |
6.9%
|
|
| 7 | 27 |
12.5%
|
|
| 8 | 29 |
13.4%
|
|
| 9 | 16 |
7.4%
|
|
| 10 | Very effective | 16 |
7.4%
|
| 11 | Don't know | 72 |
33.3%
|
| Sysmiss | 4 |