| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 1 |
0.3%
|
|
| 3 | 6 |
1.7%
|
|
| 4 | 8 |
2.2%
|
|
| 5 | 44 |
12.3%
|
|
| 6 | 84 |
23.5%
|
|
| 7 | 64 |
17.9%
|
|
| 8 | 60 |
16.8%
|
|
| 9 | 50 |
14%
|
|
| 10 | Very effective | 39 |
10.9%
|
| 11 | Don't know | 46 | |
| Sysmiss | 20 |