| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.7%
|
| 2 | 3 |
2.6%
|
|
| 3 | 8 |
6.9%
|
|
| 4 | 10 |
8.6%
|
|
| 5 | 18 |
15.5%
|
|
| 6 | 23 |
19.8%
|
|
| 7 | 17 |
14.7%
|
|
| 8 | 25 |
21.6%
|
|
| 9 | 8 |
6.9%
|
|
| 10 | Very effective | 2 |
1.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 75 |