| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.3%
|
| 2 | 7 |
3.1%
|
|
| 3 | 6 |
2.7%
|
|
| 4 | 10 |
4.4%
|
|
| 5 | 14 |
6.2%
|
|
| 6 | 17 |
7.5%
|
|
| 7 | 24 |
10.6%
|
|
| 8 | 39 |
17.3%
|
|
| 9 | 13 |
5.8%
|
|
| 10 | Very effective | 16 |
7.1%
|
| 11 | Don't know | 77 |
34.1%
|
| Sysmiss | 11 |