| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 10 |
2.4%
|
|
| 3 | 15 |
3.6%
|
|
| 4 | 13 |
3.1%
|
|
| 5 | 19 |
4.6%
|
|
| 6 | 26 |
6.2%
|
|
| 7 | 26 |
6.2%
|
|
| 8 | 24 |
5.8%
|
|
| 9 | 20 |
4.8%
|
|
| 10 | Very effective | 25 |
6%
|
| 11 | Don't know | 237 |
56.8%
|
| Sysmiss | 3 |