| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 2 |
0.7%
|
|
| 3 | 10 |
3.6%
|
|
| 4 | 15 |
5.4%
|
|
| 5 | 43 |
15.5%
|
|
| 6 | 51 |
18.3%
|
|
| 7 | 42 |
15.1%
|
|
| 8 | 40 |
14.4%
|
|
| 9 | 39 |
14%
|
|
| 10 | Very effective | 34 |
12.2%
|
| 11 | Don't know | 26 | |
| Sysmiss | 92 |