| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 20 |
11.9%
|
| 2 | 12 |
7.1%
|
|
| 3 | 4 |
2.4%
|
|
| 4 | 11 |
6.5%
|
|
| 5 | 16 |
9.5%
|
|
| 6 | 8 |
4.8%
|
|
| 7 | 21 |
12.5%
|
|
| 8 | 18 |
10.7%
|
|
| 9 | 12 |
7.1%
|
|
| 10 | Very effective | 46 |
27.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 174 |