| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.5%
|
| 2 | 1 |
0.4%
|
|
| 3 | 8 |
3%
|
|
| 4 | 9 |
3.3%
|
|
| 5 | 27 |
10%
|
|
| 6 | 14 |
5.2%
|
|
| 7 | 21 |
7.7%
|
|
| 8 | 28 |
10.3%
|
|
| 9 | 24 |
8.9%
|
|
| 10 | Very effective | 45 |
16.6%
|
| 11 | Don't know | 90 |
33.2%
|
| Sysmiss | 22 |