| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.2%
|
| 2 | 1 |
0.6%
|
|
| 3 | 2 |
1.2%
|
|
| 4 | 6 |
3.7%
|
|
| 5 | 13 |
8%
|
|
| 6 | 23 |
14.1%
|
|
| 7 | 21 |
12.9%
|
|
| 8 | 11 |
6.7%
|
|
| 9 | 6 |
3.7%
|
|
| 10 | Very effective | 4 |
2.5%
|
| 11 | Don't know | 74 |
45.4%
|
| Sysmiss | 23 |