| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.1%
|
| 2 | 3 |
1.6%
|
|
| 3 | 3 |
1.6%
|
|
| 4 | 8 |
4.3%
|
|
| 5 | 28 |
14.9%
|
|
| 6 | 17 |
9%
|
|
| 7 | 29 |
15.4%
|
|
| 8 | 33 |
17.6%
|
|
| 9 | 23 |
12.2%
|
|
| 10 | Very effective | 40 |
21.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 69 |