| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
2.9%
|
| 2 | 2 |
0.7%
|
|
| 3 | 2 |
0.7%
|
|
| 4 | 4 |
1.5%
|
|
| 5 | 14 |
5.1%
|
|
| 6 | 25 |
9.2%
|
|
| 7 | 56 |
20.6%
|
|
| 8 | 69 |
25.4%
|
|
| 9 | 51 |
18.8%
|
|
| 10 | Very effective | 41 |
15.1%
|
| 11 | Don't know | 107 | |
| Sysmiss | 42 |