| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 3 | 3 |
2.1%
|
|
| 4 | 3 |
2.1%
|
|
| 5 | 7 |
4.8%
|
|
| 6 | 18 |
12.4%
|
|
| 7 | 37 |
25.5%
|
|
| 8 | 56 |
38.6%
|
|
| 9 | 17 |
11.7%
|
|
| 10 | Very effective | 3 |
2.1%
|
| 11 | Don't know | 55 | |
| Sysmiss | 2 |