| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.9%
|
| 2 | 4 |
2.3%
|
|
| 3 | 8 |
4.6%
|
|
| 4 | 9 |
5.2%
|
|
| 5 | 24 |
13.9%
|
|
| 6 | 13 |
7.5%
|
|
| 7 | 19 |
11%
|
|
| 8 | 15 |
8.7%
|
|
| 9 | 6 |
3.5%
|
|
| 10 | Very effective | 3 |
1.7%
|
| 11 | Don't know | 67 |
38.7%
|
| Sysmiss | 13 |