| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.8%
|
| 2 | 8 |
7.5%
|
|
| 3 | 2 |
1.9%
|
|
| 4 | 8 |
7.5%
|
|
| 5 | 13 |
12.3%
|
|
| 6 | 16 |
15.1%
|
|
| 7 | 19 |
17.9%
|
|
| 8 | 19 |
17.9%
|
|
| 9 | 12 |
11.3%
|
|
| 10 | Very effective | 5 |
4.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 38 |