| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.3%
|
| 2 | 9 |
7.5%
|
|
| 3 | 12 |
10%
|
|
| 4 | 10 |
8.3%
|
|
| 5 | 19 |
15.8%
|
|
| 6 | 25 |
20.8%
|
|
| 7 | 15 |
12.5%
|
|
| 8 | 15 |
12.5%
|
|
| 9 | 3 |
2.5%
|
|
| 10 | Very effective | 8 |
6.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 140 |