| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 1 |
0.7%
|
|
| 3 | 6 |
4.2%
|
|
| 4 | 5 |
3.5%
|
|
| 5 | 13 |
9%
|
|
| 6 | 10 |
6.9%
|
|
| 7 | 23 |
16%
|
|
| 8 | 11 |
7.6%
|
|
| 9 | 8 |
5.6%
|
|
| 10 | Very effective | 3 |
2.1%
|
| 11 | Don't know | 63 |
43.8%
|
| Sysmiss | 5 |