| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 5 |
1.3%
|
|
| 3 | 2 |
0.5%
|
|
| 4 | 3 |
0.8%
|
|
| 5 | 14 |
3.7%
|
|
| 6 | 35 |
9.1%
|
|
| 7 | 79 |
20.6%
|
|
| 8 | 100 |
26.1%
|
|
| 9 | 75 |
19.6%
|
|
| 10 | Very effective | 47 |
12.3%
|
| 11 | Don't know | 22 |
5.7%
|
| Sysmiss | 1 |