| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.3%
|
| 2 | 4 |
0.7%
|
|
| 3 | 8 |
1.3%
|
|
| 4 | 27 |
4.5%
|
|
| 5 | 30 |
5%
|
|
| 6 | 44 |
7.3%
|
|
| 7 | 30 |
5%
|
|
| 8 | 96 |
15.8%
|
|
| 9 | 56 |
9.2%
|
|
| 10 | Very effective | 59 |
9.7%
|
| 11 | Don't know | 209 |
34.5%
|
| Sysmiss | 41 |
6.8%
|