| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 1 |
0.7%
|
|
| 3 | 1 |
0.7%
|
|
| 4 | 1 |
0.7%
|
|
| 5 | 6 |
3.9%
|
|
| 6 | 8 |
5.2%
|
|
| 7 | 11 |
7.2%
|
|
| 8 | 14 |
9.2%
|
|
| 9 | 6 |
3.9%
|
|
| 10 | Very effective | 3 |
2%
|
| 11 | Don't know | 101 |
66%
|
| Sysmiss | 6 |