| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.2%
|
| 2 | 4 |
2.5%
|
|
| 3 | 10 |
6.2%
|
|
| 4 | 10 |
6.2%
|
|
| 5 | 20 |
12.3%
|
|
| 6 | 24 |
14.8%
|
|
| 7 | 21 |
13%
|
|
| 8 | 29 |
17.9%
|
|
| 9 | 19 |
11.7%
|
|
| 10 | Very effective | 23 |
14.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 98 |