| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 2 |
1.3%
|
|
| 3 | 1 |
0.6%
|
|
| 4 | 5 |
3.1%
|
|
| 5 | 9 |
5.6%
|
|
| 6 | 20 |
12.5%
|
|
| 7 | 40 |
25%
|
|
| 8 | 48 |
30%
|
|
| 9 | 27 |
16.9%
|
|
| 10 | Very effective | 7 |
4.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 134 |