| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 15 |
9.4%
|
|
| 3 | 14 |
8.8%
|
|
| 4 | 9 |
5.7%
|
|
| 5 | 22 |
13.8%
|
|
| 6 | 39 |
24.5%
|
|
| 7 | 31 |
19.5%
|
|
| 8 | 15 |
9.4%
|
|
| 9 | 10 |
6.3%
|
|
| 10 | Very effective | 3 |
1.9%
|
| 11 | Don't know | 14 | |
| Sysmiss | 30 |