| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
3.7%
|
| 2 | 9 |
4.2%
|
|
| 3 | 8 |
3.7%
|
|
| 4 | 15 |
7%
|
|
| 5 | 21 |
9.8%
|
|
| 6 | 23 |
10.7%
|
|
| 7 | 40 |
18.7%
|
|
| 8 | 38 |
17.8%
|
|
| 9 | 29 |
13.6%
|
|
| 10 | Very effective | 23 |
10.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 177 |