| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 11 |
3.8%
|
|
| 3 | 10 |
3.5%
|
|
| 4 | 14 |
4.9%
|
|
| 5 | 24 |
8.4%
|
|
| 6 | 24 |
8.4%
|
|
| 7 | 22 |
7.7%
|
|
| 8 | 18 |
6.3%
|
|
| 9 | 7 |
2.4%
|
|
| 10 | Very effective | 8 |
2.8%
|
| 11 | Don't know | 148 |
51.6%
|
| Sysmiss | 15 |