| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.7%
|
| 2 | 1 |
0.6%
|
|
| 3 | 2 |
1.1%
|
|
| 4 | 10 |
5.5%
|
|
| 5 | 21 |
11.6%
|
|
| 6 | 26 |
14.4%
|
|
| 7 | 34 |
18.8%
|
|
| 8 | 32 |
17.7%
|
|
| 9 | 30 |
16.6%
|
|
| 10 | Very effective | 22 |
12.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 69 |