| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.9%
|
| 2 | 2 |
0.9%
|
|
| 3 | 3 |
1.4%
|
|
| 4 | 7 |
3.2%
|
|
| 5 | 21 |
9.7%
|
|
| 6 | 21 |
9.7%
|
|
| 7 | 44 |
20.3%
|
|
| 8 | 44 |
20.3%
|
|
| 9 | 31 |
14.3%
|
|
| 10 | Very effective | 42 |
19.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 115 |