| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 12 |
4.5%
|
| 2 | 4 |
1.5%
|
|
| 3 | 10 |
3.8%
|
|
| 4 | 18 |
6.8%
|
|
| 5 | 30 |
11.3%
|
|
| 6 | 52 |
19.6%
|
|
| 7 | 35 |
13.2%
|
|
| 8 | 44 |
16.6%
|
|
| 9 | 20 |
7.5%
|
|
| 10 | Very effective | 40 |
15.1%
|
| 11 | Don't know | 48 | |
| Sysmiss | 83 |