| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 4 |
3.3%
|
|
| 3 | 2 |
1.7%
|
|
| 4 | 4 |
3.3%
|
|
| 5 | 8 |
6.6%
|
|
| 6 | 8 |
6.6%
|
|
| 7 | 39 |
32.2%
|
|
| 8 | 29 |
24%
|
|
| 9 | 22 |
18.2%
|
|
| 10 | Extremely effective | 4 |
3.3%
|
| 11 | Don't know | 13 | |
| Sysmiss | 4 |