| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.3%
|
| 2 | 2 |
0.8%
|
|
| 3 | 11 |
4.6%
|
|
| 4 | 7 |
2.9%
|
|
| 5 | 26 |
10.9%
|
|
| 6 | 33 |
13.8%
|
|
| 7 | 39 |
16.3%
|
|
| 8 | 40 |
16.7%
|
|
| 9 | 36 |
15.1%
|
|
| 10 | Very effective | 42 |
17.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 116 |