| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
3.3%
|
| 2 | 1 |
1.7%
|
|
| 3 | 1 |
1.7%
|
|
| 4 | 5 |
8.3%
|
|
| 5 | 8 |
13.3%
|
|
| 6 | 11 |
18.3%
|
|
| 7 | 14 |
23.3%
|
|
| 8 | 11 |
18.3%
|
|
| 9 | 3 |
5%
|
|
| 10 | Very effective | 4 |
6.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 146 |