| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 | 1 |
0.8%
|
| 3 | 3 | 7 |
5.5%
|
| 4 | 4 | 5 |
3.9%
|
| 5 | 5 | 7 |
5.5%
|
| 6 | 6 | 14 |
11%
|
| 7 | 7 | 18 |
14.2%
|
| 8 | 8 | 22 |
17.3%
|
| 9 | 9 | 14 |
11%
|
| 10 | Very effective | 10 |
7.9%
|
| 11 | Don't know | 29 |
22.8%
|
| Sysmiss | 19 |