| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
3.5%
|
|
| 1 | Not effective at all | 22 |
8.5%
|
| 2 | 23 |
8.9%
|
|
| 3 | 20 |
7.8%
|
|
| 4 | 25 |
9.7%
|
|
| 5 | 26 |
10.1%
|
|
| 6 | 27 |
10.5%
|
|
| 7 | 17 |
6.6%
|
|
| 8 | 16 |
6.2%
|
|
| 9 | 13 |
5%
|
|
| 10 | Very effective | 13 |
5%
|
| 11 | Don't know | 47 |
18.2%
|
| Sysmiss | 2 |