| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 7 |
2.4%
|
|
| 3 | 7 |
2.4%
|
|
| 4 | 14 |
4.8%
|
|
| 5 | 23 |
7.9%
|
|
| 6 | 28 |
9.6%
|
|
| 7 | 37 |
12.7%
|
|
| 8 | 38 |
13.1%
|
|
| 9 | 11 |
3.8%
|
|
| 10 | Very effective | 6 |
2.1%
|
| 11 | Don't know | 118 |
40.5%
|
| Sysmiss | 11 |