| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.9%
|
| 2 | 1 |
1.5%
|
|
| 3 | 1 |
1.5%
|
|
| 4 | 2 |
2.9%
|
|
| 5 | 3 |
4.4%
|
|
| 6 | 5 |
7.4%
|
|
| 7 | 12 |
17.6%
|
|
| 8 | 20 |
29.4%
|
|
| 9 | 17 |
25%
|
|
| 10 | Very effective | 5 |
7.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 66 |