| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.3%
|
| 3 | 4 |
5.2%
|
|
| 4 | 3 |
3.9%
|
|
| 5 | 8 |
10.4%
|
|
| 6 | 5 |
6.5%
|
|
| 7 | 11 |
14.3%
|
|
| 8 | 19 |
24.7%
|
|
| 9 | 17 |
22.1%
|
|
| 10 | Very effective | 9 |
11.7%
|
| 11 | Don't know | 55 | |
| Sysmiss | 6 |