| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.9%
|
|
| 1 | Not effective at all | 9 |
4.1%
|
| 2 | 2 |
0.9%
|
|
| 3 | 7 |
3.2%
|
|
| 4 | 8 |
3.7%
|
|
| 5 | 17 |
7.8%
|
|
| 6 | 12 |
5.5%
|
|
| 7 | 19 |
8.8%
|
|
| 8 | 17 |
7.8%
|
|
| 9 | 12 |
5.5%
|
|
| 10 | Very effective | 13 |
6%
|
| 11 | Don't know | 99 |
45.6%
|
| Sysmiss | 4 |