| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.1%
|
| 2 | 2 |
2.3%
|
|
| 3 | 6 |
6.8%
|
|
| 4 | 8 |
9.1%
|
|
| 5 | 6 |
6.8%
|
|
| 6 | 10 |
11.4%
|
|
| 7 | 22 |
25%
|
|
| 8 | 21 |
23.9%
|
|
| 9 | 9 |
10.2%
|
|
| 10 | Very effective | 3 |
3.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 122 |