| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.1%
|
| 2 | 3 |
3.2%
|
|
| 3 | 7 |
7.4%
|
|
| 4 | 9 |
9.6%
|
|
| 5 | 13 |
13.8%
|
|
| 6 | 10 |
10.6%
|
|
| 7 | 13 |
13.8%
|
|
| 8 | 18 |
19.1%
|
|
| 9 | 13 |
13.8%
|
|
| 10 | Very effective | 6 |
6.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 72 |