| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.1%
|
| 2 | 4 |
1.4%
|
|
| 3 | 16 |
5.7%
|
|
| 4 | 38 |
13.6%
|
|
| 5 | 53 |
19%
|
|
| 6 | 46 |
16.5%
|
|
| 7 | 53 |
19%
|
|
| 8 | 33 |
11.8%
|
|
| 9 | 13 |
4.7%
|
|
| 10 | Very effective | 20 |
7.2%
|
| 11 | Don't know | 36 | |
| Sysmiss | 81 |