| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.6%
|
| 2 | 5 |
2.7%
|
|
| 3 | 5 |
2.7%
|
|
| 4 | 6 |
3.3%
|
|
| 5 | 20 |
10.9%
|
|
| 6 | 34 |
18.5%
|
|
| 7 | 33 |
17.9%
|
|
| 8 | 36 |
19.6%
|
|
| 9 | 16 |
8.7%
|
|
| 10 | Very effective | 26 |
14.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 171 |