| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 4 |
2.2%
|
|
| 3 | 6 |
3.3%
|
|
| 4 | 6 |
3.3%
|
|
| 5 | 24 |
13.3%
|
|
| 6 | 28 |
15.5%
|
|
| 7 | 35 |
19.3%
|
|
| 8 | 16 |
8.8%
|
|
| 9 | 26 |
14.4%
|
|
| 10 | Very effective | 35 |
19.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 174 |