| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.7%
|
| 2 | 9 |
3.9%
|
|
| 3 | 4 |
1.7%
|
|
| 4 | 14 |
6%
|
|
| 5 | 36 |
15.5%
|
|
| 6 | 26 |
11.2%
|
|
| 7 | 51 |
21.9%
|
|
| 8 | 46 |
19.7%
|
|
| 9 | 21 |
9%
|
|
| 10 | Very effective | 22 |
9.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 207 |