| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 5 |
3.2%
|
|
| 3 | 11 |
7.1%
|
|
| 4 | 10 |
6.5%
|
|
| 5 | 31 |
20%
|
|
| 6 | 45 |
29%
|
|
| 7 | 22 |
14.2%
|
|
| 8 | 19 |
12.3%
|
|
| 9 | 8 |
5.2%
|
|
| 10 | Very effective | 3 |
1.9%
|
| 11 | Don't know | 16 | |
| Sysmiss | 32 |