| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.6%
|
| 2 | 10 |
3.2%
|
|
| 3 | 13 |
4.2%
|
|
| 4 | 17 |
5.4%
|
|
| 5 | 35 |
11.2%
|
|
| 6 | 28 |
8.9%
|
|
| 7 | 38 |
12.1%
|
|
| 8 | 65 |
20.8%
|
|
| 9 | 62 |
19.8%
|
|
| 10 | Very effective | 40 |
12.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 80 |