| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.9%
|
| 2 | 2 |
3.8%
|
|
| 3 | 3 |
5.8%
|
|
| 4 | 1 |
1.9%
|
|
| 5 | 5 |
9.6%
|
|
| 6 | 10 |
19.2%
|
|
| 7 | 11 |
21.2%
|
|
| 8 | 9 |
17.3%
|
|
| 9 | 9 |
17.3%
|
|
| 10 | Very effective | 1 |
1.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 114 |