| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 5 |
3.2%
|
|
| 3 | 9 |
5.8%
|
|
| 4 | 11 |
7.1%
|
|
| 5 | 26 |
16.7%
|
|
| 6 | 28 |
17.9%
|
|
| 7 | 23 |
14.7%
|
|
| 8 | 24 |
15.4%
|
|
| 9 | 13 |
8.3%
|
|
| 10 | Very effective | 16 |
10.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 199 |