| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.3%
|
| 2 | 6 |
2%
|
|
| 3 | 4 |
1.3%
|
|
| 4 | 6 |
2%
|
|
| 5 | 43 |
14.1%
|
|
| 6 | 34 |
11.2%
|
|
| 7 | 56 |
18.4%
|
|
| 8 | 58 |
19.1%
|
|
| 9 | 42 |
13.8%
|
|
| 10 | Very effective | 51 |
16.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 51 |