| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 3 |
1.6%
|
|
| 3 | 6 |
3.2%
|
|
| 4 | 4 |
2.1%
|
|
| 5 | 17 |
9%
|
|
| 6 | 16 |
8.5%
|
|
| 7 | 23 |
12.2%
|
|
| 8 | 25 |
13.3%
|
|
| 9 | 32 |
17%
|
|
| 10 | Very effective | 61 |
32.4%
|
| 11 | NA | 0 |
0%
|
| 12 | Don't know | 0 |
0%
|
| Sysmiss | 144 |