| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 4 |
2%
|
|
| 3 | 6 |
2.9%
|
|
| 4 | 6 |
2.9%
|
|
| 5 | 15 |
7.4%
|
|
| 6 | 32 |
15.7%
|
|
| 7 | 40 |
19.6%
|
|
| 8 | 27 |
13.2%
|
|
| 9 | 10 |
4.9%
|
|
| 10 | Very effective | 4 |
2%
|
| 11 | Don't know | 58 |
28.4%
|
| Sysmiss | 2 |