| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.5%
|
| 2 | 12 |
4.5%
|
|
| 3 | 17 |
6.4%
|
|
| 4 | 23 |
8.6%
|
|
| 5 | 45 |
16.9%
|
|
| 6 | 24 |
9%
|
|
| 7 | 34 |
12.7%
|
|
| 8 | 40 |
15%
|
|
| 9 | 28 |
10.5%
|
|
| 10 | Very effective | 40 |
15%
|
| 11 | Don't know | 39 | |
| Sysmiss | 13 |