| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 4 |
3.2%
|
|
| 3 | 7 |
5.6%
|
|
| 4 | 12 |
9.5%
|
|
| 5 | 16 |
12.7%
|
|
| 6 | 7 |
5.6%
|
|
| 7 | 30 |
23.8%
|
|
| 8 | 27 |
21.4%
|
|
| 9 | 15 |
11.9%
|
|
| 10 | Very effective | 7 |
5.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 249 |