| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
0.9%
|
| 2 | 13 |
3%
|
|
| 3 | 6 |
1.4%
|
|
| 4 | 9 |
2.1%
|
|
| 5 | 25 |
5.7%
|
|
| 6 | 34 |
7.8%
|
|
| 7 | 51 |
11.7%
|
|
| 8 | 42 |
9.6%
|
|
| 9 | 39 |
8.9%
|
|
| 10 | Very effective | 102 |
23.3%
|
| 11 | Don't know | 112 |
25.6%
|
| Sysmiss | 130 |