| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.8%
|
| 2 | 1 |
0.9%
|
|
| 3 | 2 |
1.8%
|
|
| 4 | 5 |
4.5%
|
|
| 5 | 12 |
10.9%
|
|
| 6 | 7 |
6.4%
|
|
| 7 | 23 |
20.9%
|
|
| 8 | 30 |
27.3%
|
|
| 9 | 19 |
17.3%
|
|
| 10 | Very effective | 9 |
8.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 24 |