| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.8%
|
| 2 | 7 |
2.9%
|
|
| 3 | 11 |
4.6%
|
|
| 4 | 12 |
5%
|
|
| 5 | 24 |
10%
|
|
| 6 | 39 |
16.3%
|
|
| 7 | 58 |
24.3%
|
|
| 8 | 37 |
15.5%
|
|
| 9 | 31 |
13%
|
|
| 10 | Very effective | 18 |
7.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 201 |