| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 10 |
4.2%
|
| 2 | 2 |
0.8%
|
|
| 3 | 3 |
1.3%
|
|
| 4 | 9 |
3.8%
|
|
| 5 | 13 |
5.5%
|
|
| 6 | 24 |
10.1%
|
|
| 7 | 42 |
17.7%
|
|
| 8 | 57 |
24.1%
|
|
| 9 | 50 |
21.1%
|
|
| 10 | Very effective | 27 |
11.4%
|
| 11 | Don't know | 150 | |
| Sysmiss | 34 |