| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.4%
|
| 2 | 1 |
1.4%
|
|
| 3 | 1 |
1.4%
|
|
| 4 | 6 |
8.5%
|
|
| 5 | 8 |
11.3%
|
|
| 6 | 7 |
9.9%
|
|
| 7 | 15 |
21.1%
|
|
| 8 | 21 |
29.6%
|
|
| 9 | 8 |
11.3%
|
|
| 10 | Very effective | 3 |
4.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 76 |