| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 4 |
1.9%
|
|
| 3 | 3 |
1.4%
|
|
| 4 | 9 |
4.2%
|
|
| 5 | 14 |
6.5%
|
|
| 6 | 16 |
7.4%
|
|
| 7 | 19 |
8.8%
|
|
| 8 | 30 |
13.9%
|
|
| 9 | 13 |
6%
|
|
| 10 | Very effective | 38 |
17.6%
|
| 11 | Don't know | 69 |
31.9%
|
| Sysmiss | 4 |