| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 2 | 0 |
0%
|
| 3 | 3 | 5 |
4%
|
| 4 | 4 | 5 |
4%
|
| 5 | 5 | 13 |
10.3%
|
| 6 | 6 | 10 |
7.9%
|
| 7 | 7 | 18 |
14.3%
|
| 8 | 8 | 15 |
11.9%
|
| 9 | 9 | 12 |
9.5%
|
| 10 | Very effective | 12 |
9.5%
|
| 11 | Don't know | 35 |
27.8%
|
| Sysmiss | 20 |