| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 5 |
1.8%
|
|
| 3 | 8 |
2.8%
|
|
| 4 | 10 |
3.5%
|
|
| 5 | 19 |
6.7%
|
|
| 6 | 20 |
7%
|
|
| 7 | 25 |
8.8%
|
|
| 8 | 23 |
8.1%
|
|
| 9 | 8 |
2.8%
|
|
| 10 | Very effective | 5 |
1.8%
|
| 11 | Don't know | 160 |
56.1%
|
| Sysmiss | 17 |