| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
4.3%
|
| 2 | 7 |
3.8%
|
|
| 3 | 11 |
5.9%
|
|
| 4 | 12 |
6.5%
|
|
| 5 | 15 |
8.1%
|
|
| 6 | 18 |
9.7%
|
|
| 7 | 22 |
11.8%
|
|
| 8 | 31 |
16.7%
|
|
| 9 | 19 |
10.2%
|
|
| 10 | Very effective | 43 |
23.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 156 |