| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 9 |
3.9%
|
| 2 | 4 |
1.7%
|
|
| 3 | 9 |
3.9%
|
|
| 4 | 17 |
7.4%
|
|
| 5 | 21 |
9.1%
|
|
| 6 | 18 |
7.8%
|
|
| 7 | 28 |
12.2%
|
|
| 8 | 44 |
19.1%
|
|
| 9 | 24 |
10.4%
|
|
| 10 | Very effective | 15 |
6.5%
|
| 11 | Don't know | 41 |
17.8%
|
| Sysmiss | 18 |