| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 1 |
0.5%
|
|
| 3 | 14 |
6.7%
|
|
| 4 | 8 |
3.8%
|
|
| 5 | 26 |
12.4%
|
|
| 6 | 19 |
9.1%
|
|
| 7 | 47 |
22.5%
|
|
| 8 | 28 |
13.4%
|
|
| 9 | 25 |
12%
|
|
| 10 | Very effective | 40 |
19.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 146 |