| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.8%
|
| 2 | 2 |
0.7%
|
|
| 3 | 6 |
2.2%
|
|
| 4 | 7 |
2.6%
|
|
| 5 | 21 |
7.7%
|
|
| 6 | 15 |
5.5%
|
|
| 7 | 19 |
7%
|
|
| 8 | 18 |
6.6%
|
|
| 9 | 20 |
7.3%
|
|
| 10 | Very effective | 36 |
13.2%
|
| 11 | Don't know | 124 |
45.4%
|
| Sysmiss | 20 |