| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 1 |
0.7%
|
|
| 3 | 3 |
2.1%
|
|
| 4 | 3 |
2.1%
|
|
| 5 | 13 |
9.1%
|
|
| 6 | 14 |
9.8%
|
|
| 7 | 34 |
23.8%
|
|
| 8 | 36 |
25.2%
|
|
| 9 | 27 |
18.9%
|
|
| 10 | Very effective | 11 |
7.7%
|
| 11 | Don't know | 35 | |
| Sysmiss | 15 |