| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.8%
|
| 2 | 5 |
1.9%
|
|
| 3 | 13 |
5%
|
|
| 4 | 18 |
7%
|
|
| 5 | 38 |
14.7%
|
|
| 6 | 51 |
19.8%
|
|
| 7 | 67 |
26%
|
|
| 8 | 34 |
13.2%
|
|
| 9 | 23 |
8.9%
|
|
| 10 | Very effective | 7 |
2.7%
|
| 11 | Don't know | 95 | |
| Sysmiss | 13 |