| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.2%
|
| 2 | 3 |
3.2%
|
|
| 3 | 3 |
3.2%
|
|
| 4 | 7 |
7.5%
|
|
| 5 | 7 |
7.5%
|
|
| 6 | 19 |
20.4%
|
|
| 7 | 12 |
12.9%
|
|
| 8 | 15 |
16.1%
|
|
| 9 | 14 |
15.1%
|
|
| 10 | Very effective | 11 |
11.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 73 |