| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 7 |
4.3%
|
|
| 3 | 9 |
5.6%
|
|
| 4 | 15 |
9.3%
|
|
| 5 | 18 |
11.2%
|
|
| 6 | 21 |
13%
|
|
| 7 | 40 |
24.8%
|
|
| 8 | 28 |
17.4%
|
|
| 9 | 12 |
7.5%
|
|
| 10 | Very effective | 10 |
6.2%
|
| 11 | Don't know | 40 | |
| Sysmiss | 37 |