| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.5%
|
| 2 | 5 |
2.5%
|
|
| 3 | 13 |
6.5%
|
|
| 4 | 13 |
6.5%
|
|
| 5 | 29 |
14.5%
|
|
| 6 | 34 |
17%
|
|
| 7 | 19 |
9.5%
|
|
| 8 | 26 |
13%
|
|
| 9 | 21 |
10.5%
|
|
| 10 | Very effective | 35 |
17.5%
|
| 11 | Don't know | 66 | |
| Sysmiss | 53 |