| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.6%
|
| 2 | 1 |
0.5%
|
|
| 3 | 3 |
1.6%
|
|
| 4 | 8 |
4.3%
|
|
| 5 | 14 |
7.4%
|
|
| 6 | 6 |
3.2%
|
|
| 7 | 17 |
9%
|
|
| 8 | 25 |
13.3%
|
|
| 9 | 12 |
6.4%
|
|
| 10 | Very effective | 10 |
5.3%
|
| 11 | Don't know | 89 |
47.3%
|
| Sysmiss | 13 |