| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.6%
|
|
| 1 | Not effective at all | 2 |
0.6%
|
| 2 | 1 |
0.3%
|
|
| 3 | 3 |
0.9%
|
|
| 4 | 3 |
0.9%
|
|
| 5 | 19 |
5.7%
|
|
| 6 | 27 |
8.1%
|
|
| 7 | 55 |
16.5%
|
|
| 8 | 71 |
21.3%
|
|
| 9 | 25 |
7.5%
|
|
| 10 | Very effective | 9 |
2.7%
|
| 11 | Don't know | 117 |
35%
|
| Sysmiss | 6 |