| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 1 |
0.3%
|
|
| 3 | 4 |
1.2%
|
|
| 4 | 7 |
2.1%
|
|
| 5 | 17 |
5%
|
|
| 6 | 33 |
9.8%
|
|
| 7 | 81 |
24%
|
|
| 8 | 89 |
26.3%
|
|
| 9 | 46 |
13.6%
|
|
| 10 | Very effective | 25 |
7.4%
|
| 11 | Don't know | 34 |
10.1%
|
| Sysmiss | 2 |