| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 | 4 |
3.3%
|
| 3 | 3 | 6 |
4.9%
|
| 4 | 4 | 6 |
4.9%
|
| 5 | 5 | 9 |
7.4%
|
| 6 | 6 | 10 |
8.2%
|
| 7 | 7 | 10 |
8.2%
|
| 8 | 8 | 7 |
5.7%
|
| 9 | 9 | 8 |
6.6%
|
| 10 | Very effective | 4 |
3.3%
|
| 11 | Don't know | 58 |
47.5%
|
| Sysmiss | 24 |