| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.4%
|
| 2 | 1 |
0.7%
|
|
| 3 | 4 |
2.8%
|
|
| 4 | 6 |
4.2%
|
|
| 5 | 6 |
4.2%
|
|
| 6 | 14 |
9.9%
|
|
| 7 | 9 |
6.3%
|
|
| 8 | 21 |
14.8%
|
|
| 9 | 12 |
8.5%
|
|
| 10 | Very effective | 6 |
4.2%
|
| 11 | Don't know | 61 |
43%
|
| Sysmiss | 15 |