| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
2.7%
|
| 2 | 2 |
0.8%
|
|
| 3 | 7 |
2.7%
|
|
| 4 | 4 |
1.5%
|
|
| 5 | 15 |
5.7%
|
|
| 6 | 20 |
7.6%
|
|
| 7 | 51 |
19.3%
|
|
| 8 | 63 |
23.9%
|
|
| 9 | 48 |
18.2%
|
|
| 10 | Very effective | 47 |
17.8%
|
| 11 | Don't know | 106 | |
| Sysmiss | 51 |