| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.3%
|
| 2 | 1 |
0.4%
|
|
| 3 | 2 |
0.8%
|
|
| 4 | 6 |
2.5%
|
|
| 5 | 19 |
8.1%
|
|
| 6 | 26 |
11%
|
|
| 7 | 33 |
14%
|
|
| 8 | 50 |
21.2%
|
|
| 9 | 29 |
12.3%
|
|
| 10 | Very effective | 46 |
19.5%
|
| 11 | Don't know | 21 |
8.9%
|
| Sysmiss | 1 |