| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 3 |
2.4%
|
|
| 3 | 3 |
2.4%
|
|
| 4 | 2 |
1.6%
|
|
| 5 | 12 |
9.7%
|
|
| 6 | 6 |
4.8%
|
|
| 7 | 21 |
16.9%
|
|
| 8 | 33 |
26.6%
|
|
| 9 | 22 |
17.7%
|
|
| 10 | Very effective | 21 |
16.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 208 |