| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 18 |
16.5%
|
| 2 | 10 |
9.2%
|
|
| 3 | 14 |
12.8%
|
|
| 4 | 14 |
12.8%
|
|
| 5 | 20 |
18.3%
|
|
| 6 | 15 |
13.8%
|
|
| 7 | 6 |
5.5%
|
|
| 8 | 10 |
9.2%
|
|
| 9 | 1 |
0.9%
|
|
| 10 | Very effective | 1 |
0.9%
|
| 11 | Don't know | 128 | |
| Sysmiss | 52 |