| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.1%
|
| 2 | 1 |
0.7%
|
|
| 3 | 5 |
3.5%
|
|
| 4 | 4 |
2.8%
|
|
| 5 | 6 |
4.2%
|
|
| 6 | 8 |
5.6%
|
|
| 7 | 15 |
10.4%
|
|
| 8 | 27 |
18.8%
|
|
| 9 | 13 |
9%
|
|
| 10 | Very effective | 14 |
9.7%
|
| 11 | Don't know | 48 |
33.3%
|
| Sysmiss | 13 |