| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 5 |
2.4%
|
|
| 3 | 4 |
2%
|
|
| 4 | 9 |
4.4%
|
|
| 5 | 17 |
8.3%
|
|
| 6 | 29 |
14.1%
|
|
| 7 | 57 |
27.8%
|
|
| 8 | 53 |
25.9%
|
|
| 9 | 25 |
12.2%
|
|
| 10 | Very effective | 5 |
2.4%
|
| 11 | Don't know | 141 | |
| Sysmiss | 14 |