| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
2.1%
|
| 2 | 9 |
2.7%
|
|
| 3 | 13 |
3.9%
|
|
| 4 | 21 |
6.3%
|
|
| 5 | 33 |
9.8%
|
|
| 6 | 39 |
11.6%
|
|
| 7 | 31 |
9.2%
|
|
| 8 | 24 |
7.1%
|
|
| 9 | 17 |
5.1%
|
|
| 10 | Very effective | 16 |
4.8%
|
| 11 | Don't know | 126 |
37.5%
|
| Sysmiss | 18 |