| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.5%
|
| 2 | 3 |
2.3%
|
|
| 3 | 9 |
6.8%
|
|
| 4 | 19 |
14.3%
|
|
| 5 | 27 |
20.3%
|
|
| 6 | 31 |
23.3%
|
|
| 7 | 26 |
19.5%
|
|
| 8 | 10 |
7.5%
|
|
| 9 | 5 |
3.8%
|
|
| 10 | Very effective | 1 |
0.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 63 |