| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.4%
|
| 2 | 20 |
3.8%
|
|
| 3 | 27 |
5.2%
|
|
| 4 | 59 |
11.3%
|
|
| 5 | 103 |
19.8%
|
|
| 6 | 184 |
35.4%
|
|
| 7 | 68 |
13.1%
|
|
| 8 | 44 |
8.5%
|
|
| 9 | 8 |
1.5%
|
|
| 10 | Very effective | 5 |
1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 43 |