| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 2 |
1.7%
|
|
| 3 | 5 |
4.2%
|
|
| 4 | 6 |
5%
|
|
| 5 | 22 |
18.3%
|
|
| 6 | 31 |
25.8%
|
|
| 7 | 18 |
15%
|
|
| 8 | 20 |
16.7%
|
|
| 9 | 9 |
7.5%
|
|
| 10 | Very effective | 6 |
5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 71 |