| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.6%
|
| 2 | 16 |
3.5%
|
|
| 3 | 29 |
6.3%
|
|
| 4 | 34 |
7.3%
|
|
| 5 | 75 |
16.2%
|
|
| 6 | 84 |
18.1%
|
|
| 7 | 81 |
17.5%
|
|
| 8 | 71 |
15.3%
|
|
| 9 | 53 |
11.4%
|
|
| 10 | Very effective | 17 |
3.7%
|
| 11 | Don't know | 26 | |
| Sysmiss | 16 |