| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 2 |
1%
|
| 2 | 7 |
3.5%
|
|
| 3 | 6 |
3%
|
|
| 4 | 21 |
10.5%
|
|
| 5 | 20 |
10%
|
|
| 6 | 31 |
15.5%
|
|
| 7 | 27 |
13.5%
|
|
| 8 | 18 |
9%
|
|
| 9 | 20 |
10%
|
|
| 10 | Very effective | 16 |
8%
|
| 11 | Don't know | 31 |
15.5%
|
| Sysmiss | 25 |