| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.1%
|
| 2 | 5 |
3.5%
|
|
| 3 | 8 |
5.6%
|
|
| 4 | 9 |
6.3%
|
|
| 5 | 12 |
8.3%
|
|
| 6 | 28 |
19.4%
|
|
| 7 | 23 |
16%
|
|
| 8 | 22 |
15.3%
|
|
| 9 | 18 |
12.5%
|
|
| 10 | Very effective | 16 |
11.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 211 |