| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
3.4%
|
| 2 | 11 |
6.3%
|
|
| 3 | 10 |
5.7%
|
|
| 4 | 17 |
9.7%
|
|
| 5 | 15 |
8.5%
|
|
| 6 | 21 |
11.9%
|
|
| 7 | 15 |
8.5%
|
|
| 8 | 13 |
7.4%
|
|
| 9 | 9 |
5.1%
|
|
| 10 | Very effective | 19 |
10.8%
|
| 11 | Don't know | 39 |
22.2%
|
| 12 | Not applicable | 1 |
0.6%
|
| Sysmiss | 31 |