| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
3%
|
| 2 | 2 |
0.9%
|
|
| 3 | 6 |
2.6%
|
|
| 4 | 13 |
5.6%
|
|
| 5 | 17 |
7.3%
|
|
| 6 | 27 |
11.6%
|
|
| 7 | 28 |
12.1%
|
|
| 8 | 50 |
21.6%
|
|
| 9 | 23 |
9.9%
|
|
| 10 | Very effective | 17 |
7.3%
|
| 11 | Don't know | 42 |
18.1%
|
| Sysmiss | 16 |