| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.6%
|
| 2 | 2 |
1.6%
|
|
| 3 | 6 |
4.7%
|
|
| 4 | 5 |
3.9%
|
|
| 5 | 10 |
7.8%
|
|
| 6 | 21 |
16.4%
|
|
| 7 | 37 |
28.9%
|
|
| 8 | 28 |
21.9%
|
|
| 9 | 10 |
7.8%
|
|
| 10 | Very effective | 7 |
5.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 166 |