| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 7 |
2.5%
|
|
| 3 | 9 |
3.2%
|
|
| 4 | 29 |
10.4%
|
|
| 5 | 38 |
13.6%
|
|
| 6 | 51 |
18.3%
|
|
| 7 | 62 |
22.2%
|
|
| 8 | 53 |
19%
|
|
| 9 | 21 |
7.5%
|
|
| 10 | Very effective | 8 |
2.9%
|
| 11 | Don't know | 76 | |
| Sysmiss | 11 |