| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.3%
|
| 2 | 4 |
3.1%
|
|
| 3 | 12 |
9.3%
|
|
| 4 | 5 |
3.9%
|
|
| 5 | 21 |
16.3%
|
|
| 6 | 9 |
7%
|
|
| 7 | 20 |
15.5%
|
|
| 8 | 26 |
20.2%
|
|
| 9 | 15 |
11.6%
|
|
| 10 | Very effective | 14 |
10.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 150 |