| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.8%
|
| 2 | 8 |
4.7%
|
|
| 3 | 9 |
5.3%
|
|
| 4 | 8 |
4.7%
|
|
| 5 | 31 |
18.2%
|
|
| 6 | 27 |
15.9%
|
|
| 7 | 35 |
20.6%
|
|
| 8 | 29 |
17.1%
|
|
| 9 | 11 |
6.5%
|
|
| 10 | Very effective | 9 |
5.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 21 |