| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.4%
|
| 2 | 2 |
1.6%
|
|
| 3 | 2 |
1.6%
|
|
| 4 | 3 |
2.4%
|
|
| 5 | 7 |
5.6%
|
|
| 6 | 11 |
8.9%
|
|
| 7 | 21 |
16.9%
|
|
| 8 | 27 |
21.8%
|
|
| 9 | 25 |
20.2%
|
|
| 10 | Very effective | 23 |
18.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 208 |