| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.9%
|
| 2 | 5 |
1.5%
|
|
| 3 | 5 |
1.5%
|
|
| 4 | 14 |
4.2%
|
|
| 5 | 29 |
8.7%
|
|
| 6 | 51 |
15.3%
|
|
| 7 | 46 |
13.8%
|
|
| 8 | 43 |
12.9%
|
|
| 9 | 34 |
10.2%
|
|
| 10 | Very effective | 39 |
11.7%
|
| 11 | Don't know | 64 |
19.2%
|
| Sysmiss | 21 |