| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 4 |
1.4%
|
|
| 3 | 19 |
6.4%
|
|
| 4 | 32 |
10.8%
|
|
| 5 | 40 |
13.5%
|
|
| 6 | 54 |
18.2%
|
|
| 7 | 68 |
23%
|
|
| 8 | 44 |
14.9%
|
|
| 9 | 24 |
8.1%
|
|
| 10 | Very effective | 9 |
3%
|
| 11 | Don't know | 58 | |
| Sysmiss | 12 |