| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.5%
|
| 3 | 2 |
3%
|
|
| 4 | 2 |
3%
|
|
| 5 | 8 |
11.9%
|
|
| 6 | 13 |
19.4%
|
|
| 7 | 19 |
28.4%
|
|
| 8 | 12 |
17.9%
|
|
| 9 | 6 |
9%
|
|
| 10 | Very effective | 4 |
6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 80 |