| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 1 |
0.7%
|
|
| 3 | 5 |
3.4%
|
|
| 4 | 4 |
2.7%
|
|
| 5 | 5 |
3.4%
|
|
| 6 | 9 |
6.1%
|
|
| 7 | 13 |
8.8%
|
|
| 8 | 17 |
11.5%
|
|
| 9 | 15 |
10.1%
|
|
| 10 | Very effective | 9 |
6.1%
|
| 11 | Don't know | 69 |
46.6%
|
| Sysmiss | 9 |