| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.4%
|
|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 4 |
1.9%
|
|
| 3 | 3 |
1.4%
|
|
| 4 | 14 |
6.5%
|
|
| 5 | 27 |
12.5%
|
|
| 6 | 14 |
6.5%
|
|
| 7 | 23 |
10.6%
|
|
| 8 | 14 |
6.5%
|
|
| 9 | 11 |
5.1%
|
|
| 10 | Very effective | 10 |
4.6%
|
| 11 | Don't know | 89 |
41.2%
|
| Sysmiss | 4 |