| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.9%
|
| 2 | 2 |
1.7%
|
|
| 3 | 6 |
5.2%
|
|
| 4 | 4 |
3.4%
|
|
| 5 | 7 |
6%
|
|
| 6 | 23 |
19.8%
|
|
| 7 | 33 |
28.4%
|
|
| 8 | 26 |
22.4%
|
|
| 9 | 11 |
9.5%
|
|
| 10 | Very effective | 3 |
2.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 178 |