| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 1 |
0.5%
|
|
| 3 | 10 |
4.7%
|
|
| 4 | 10 |
4.7%
|
|
| 5 | 28 |
13.3%
|
|
| 6 | 22 |
10.4%
|
|
| 7 | 29 |
13.7%
|
|
| 8 | 30 |
14.2%
|
|
| 9 | 24 |
11.4%
|
|
| 10 | Very effective | 53 |
25.1%
|
| 11 | Don't know | 52 | |
| Sysmiss | 56 |