| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 3 |
2%
|
|
| 3 | 8 |
5.4%
|
|
| 4 | 11 |
7.4%
|
|
| 5 | 32 |
21.6%
|
|
| 6 | 36 |
24.3%
|
|
| 7 | 20 |
13.5%
|
|
| 8 | 12 |
8.1%
|
|
| 9 | 16 |
10.8%
|
|
| 10 | Very effective | 9 |
6.1%
|
| 11 | Don't know | 15 | |
| Sysmiss | 40 |