| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.1%
|
| 2 | 1 |
0.7%
|
|
| 3 | 1 |
0.7%
|
|
| 4 | 2 |
1.4%
|
|
| 5 | 9 |
6.3%
|
|
| 6 | 6 |
4.2%
|
|
| 7 | 20 |
13.9%
|
|
| 8 | 42 |
29.2%
|
|
| 9 | 33 |
22.9%
|
|
| 10 | Very effective | 27 |
18.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 20 |