| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
4.1%
|
| 2 | 5 |
3.4%
|
|
| 3 | 8 |
5.4%
|
|
| 4 | 10 |
6.8%
|
|
| 5 | 18 |
12.2%
|
|
| 6 | 24 |
16.3%
|
|
| 7 | 26 |
17.7%
|
|
| 8 | 20 |
13.6%
|
|
| 9 | 16 |
10.9%
|
|
| 10 | Very effective | 14 |
9.5%
|
| 11 | NA | 3 | |
| 12 | Don't know | 58 | |
| Sysmiss | 30 |