| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.6%
|
| 2 | 1 |
1.6%
|
|
| 3 | 4 |
6.3%
|
|
| 4 | 4 |
6.3%
|
|
| 5 | 12 |
19%
|
|
| 6 | 5 |
7.9%
|
|
| 7 | 12 |
19%
|
|
| 8 | 9 |
14.3%
|
|
| 9 | 8 |
12.7%
|
|
| 10 | Very effective | 7 |
11.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 143 |