| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 3 |
1.3%
|
|
| 3 | 7 |
3%
|
|
| 4 | 7 |
3%
|
|
| 5 | 25 |
10.7%
|
|
| 6 | 31 |
13.2%
|
|
| 7 | 33 |
14.1%
|
|
| 8 | 51 |
21.8%
|
|
| 9 | 36 |
15.4%
|
|
| 10 | Very effective | 40 |
17.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 121 |