| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.9%
|
| 2 | 3 |
1.9%
|
|
| 3 | 8 |
5%
|
|
| 4 | 13 |
8.1%
|
|
| 5 | 14 |
8.7%
|
|
| 6 | 18 |
11.2%
|
|
| 7 | 26 |
16.1%
|
|
| 8 | 30 |
18.6%
|
|
| 9 | 28 |
17.4%
|
|
| 10 | Very effective | 18 |
11.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 232 |