| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.4%
|
| 2 | 8 |
2.9%
|
|
| 3 | 14 |
5%
|
|
| 4 | 24 |
8.6%
|
|
| 5 | 48 |
17.1%
|
|
| 6 | 45 |
16.1%
|
|
| 7 | 52 |
18.6%
|
|
| 8 | 50 |
17.9%
|
|
| 9 | 17 |
6.1%
|
|
| 10 | Very effective | 18 |
6.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 195 |