| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.5%
|
|
| 3 | 0 |
0%
|
|
| 4 | 3 |
1.4%
|
|
| 5 | 10 |
4.6%
|
|
| 6 | 23 |
10.6%
|
|
| 7 | 36 |
16.6%
|
|
| 8 | 21 |
9.7%
|
|
| 9 | 34 |
15.7%
|
|
| 10 | Very effective | 31 |
14.3%
|
| 11 | Don't know | 57 |
26.3%
|
| Sysmiss | 3 |