| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 1 |
0.8%
|
|
| 3 | 3 |
2.3%
|
|
| 4 | 5 |
3.9%
|
|
| 5 | 11 |
8.5%
|
|
| 6 | 15 |
11.6%
|
|
| 7 | 27 |
20.9%
|
|
| 8 | 45 |
34.9%
|
|
| 9 | 12 |
9.3%
|
|
| 10 | Very effective | 9 |
7%
|
| 11 | Don't know | 43 | |
| Sysmiss | 21 |