| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 2 |
1.4%
|
|
| 3 | 4 |
2.8%
|
|
| 4 | 6 |
4.3%
|
|
| 5 | 4 |
2.8%
|
|
| 6 | 4 |
2.8%
|
|
| 7 | 18 |
12.8%
|
|
| 8 | 22 |
15.6%
|
|
| 9 | 22 |
15.6%
|
|
| 10 | Very effective | 9 |
6.4%
|
| 11 | Don't know | 49 |
34.8%
|
| Sysmiss | 16 |