| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
1.5%
|
| 2 | 17 |
3.3%
|
|
| 3 | 29 |
5.5%
|
|
| 4 | 35 |
6.7%
|
|
| 5 | 84 |
16.1%
|
|
| 6 | 80 |
15.3%
|
|
| 7 | 95 |
18.2%
|
|
| 8 | 70 |
13.4%
|
|
| 9 | 57 |
10.9%
|
|
| 10 | Very effective | 48 |
9.2%
|
| 11 | Don't know | 131 | |
| Sysmiss | 65 |