| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.5%
|
|
| 1 | Not effective at all | 6 |
3%
|
| 2 | 5 |
2.5%
|
|
| 3 | 12 |
6%
|
|
| 4 | 15 |
7.5%
|
|
| 5 | 16 |
8%
|
|
| 6 | 26 |
13.1%
|
|
| 7 | 32 |
16.1%
|
|
| 8 | 25 |
12.6%
|
|
| 9 | 17 |
8.5%
|
|
| 10 | Very effective | 20 |
10.1%
|
| 11 | Don't know | 22 |
11.1%
|
| Sysmiss | 26 |