| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.6%
|
| 2 | 2 |
1.6%
|
|
| 3 | 2 |
1.6%
|
|
| 4 | 6 |
4.7%
|
|
| 5 | 9 |
7.1%
|
|
| 6 | 4 |
3.1%
|
|
| 7 | 13 |
10.2%
|
|
| 8 | 11 |
8.7%
|
|
| 9 | 13 |
10.2%
|
|
| 10 | Very effective | 65 |
51.2%
|
| 11 | Don't know | 27 | |
| Sysmiss | 26 |