| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.9%
|
| 2 | 1 |
0.5%
|
|
| 3 | 7 |
3.4%
|
|
| 4 | 13 |
6.3%
|
|
| 5 | 21 |
10.2%
|
|
| 6 | 28 |
13.6%
|
|
| 7 | 31 |
15%
|
|
| 8 | 37 |
18%
|
|
| 9 | 22 |
10.7%
|
|
| 10 | Very effective | 40 |
19.4%
|
| 11 | NA | 0 |
0%
|
| 12 | Don't know | 0 |
0%
|
| Sysmiss | 149 |