| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.6%
|
| 2 | 1 |
0.8%
|
|
| 3 | 8 |
6.6%
|
|
| 4 | 9 |
7.4%
|
|
| 5 | 7 |
5.7%
|
|
| 6 | 10 |
8.2%
|
|
| 7 | 17 |
13.9%
|
|
| 8 | 30 |
24.6%
|
|
| 9 | 21 |
17.2%
|
|
| 10 | Very effective | 17 |
13.9%
|
| -99 | 17 | ||
| 11 | Don't know | 43 | |
| Sysmiss | 22 |