| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.1%
|
| 2 | 1 |
1.1%
|
|
| 3 | 4 |
4.5%
|
|
| 4 | 5 |
5.7%
|
|
| 5 | 9 |
10.2%
|
|
| 6 | 17 |
19.3%
|
|
| 7 | 18 |
20.5%
|
|
| 8 | 19 |
21.6%
|
|
| 9 | 9 |
10.2%
|
|
| 10 | Very effective | 5 |
5.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 59 |