| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.9%
|
| 2 | 6 |
1.8%
|
|
| 3 | 11 |
3.3%
|
|
| 4 | 8 |
2.4%
|
|
| 5 | 33 |
9.8%
|
|
| 6 | 39 |
11.6%
|
|
| 7 | 39 |
11.6%
|
|
| 8 | 37 |
11%
|
|
| 9 | 19 |
5.7%
|
|
| 10 | Very effective | 23 |
6.8%
|
| 11 | Don't know | 118 |
35.1%
|
| Sysmiss | 18 |