| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 3 |
1%
|
|
| 3 | 5 |
1.7%
|
|
| 4 | 6 |
2%
|
|
| 5 | 20 |
6.8%
|
|
| 6 | 23 |
7.8%
|
|
| 7 | 24 |
8.2%
|
|
| 8 | 49 |
16.7%
|
|
| 9 | 35 |
11.9%
|
|
| 10 | Very effective | 50 |
17.1%
|
| 11 | Don't know | 76 |
25.9%
|
| Sysmiss | 145 |