| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.4%
|
| 2 | 3 |
0.5%
|
|
| 3 | 9 |
1.6%
|
|
| 4 | 30 |
5.4%
|
|
| 5 | 64 |
11.6%
|
|
| 6 | 106 |
19.2%
|
|
| 7 | 152 |
27.5%
|
|
| 8 | 139 |
25.1%
|
|
| 9 | 39 |
7.1%
|
|
| 10 | Very effective | 9 |
1.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 10 |