| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 3 |
2.2%
|
|
| 3 | 3 |
2.2%
|
|
| 4 | 7 |
5.1%
|
|
| 5 | 19 |
13.8%
|
|
| 6 | 16 |
11.6%
|
|
| 7 | 24 |
17.4%
|
|
| 8 | 28 |
20.3%
|
|
| 9 | 15 |
10.9%
|
|
| 10 | Very effective | 22 |
15.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 28 |