| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.4%
|
| 2 | 6 |
4.3%
|
|
| 3 | 9 |
6.4%
|
|
| 4 | 11 |
7.8%
|
|
| 5 | 28 |
19.9%
|
|
| 6 | 38 |
27%
|
|
| 7 | 14 |
9.9%
|
|
| 8 | 11 |
7.8%
|
|
| 9 | 15 |
10.6%
|
|
| 10 | Very effective | 7 |
5%
|
| 11 | Don't know | 17 | |
| Sysmiss | 45 |