| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.8%
|
| 2 | 1 |
0.6%
|
|
| 3 | 7 |
4.2%
|
|
| 4 | 7 |
4.2%
|
|
| 5 | 20 |
11.9%
|
|
| 6 | 21 |
12.5%
|
|
| 7 | 29 |
17.3%
|
|
| 8 | 30 |
17.9%
|
|
| 9 | 20 |
11.9%
|
|
| 10 | Very effective | 30 |
17.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 92 |