| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
9.9%
|
| 2 | 6 |
7.4%
|
|
| 3 | 3 |
3.7%
|
|
| 4 | 6 |
7.4%
|
|
| 5 | 5 |
6.2%
|
|
| 6 | 8 |
9.9%
|
|
| 7 | 11 |
13.6%
|
|
| 8 | 6 |
7.4%
|
|
| 9 | 7 |
8.6%
|
|
| 10 | Very effective | 21 |
25.9%
|
| 11 | N/A | 5 | |
| 12 | Don't know | 71 | |
| Sysmiss | 23 |