| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.5%
|
| 2 | 14 |
5.4%
|
|
| 3 | 17 |
6.6%
|
|
| 4 | 30 |
11.6%
|
|
| 5 | 41 |
15.8%
|
|
| 6 | 37 |
14.3%
|
|
| 7 | 42 |
16.2%
|
|
| 8 | 34 |
13.1%
|
|
| 9 | 19 |
7.3%
|
|
| 10 | Very effective | 21 |
8.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 216 |