| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.5%
|
| 2 | 6 |
2.9%
|
|
| 3 | 14 |
6.8%
|
|
| 4 | 10 |
4.9%
|
|
| 5 | 20 |
9.8%
|
|
| 6 | 20 |
9.8%
|
|
| 7 | 25 |
12.2%
|
|
| 8 | 30 |
14.6%
|
|
| 9 | 20 |
9.8%
|
|
| 10 | Very effective | 25 |
12.2%
|
| 11 | 32 |
15.6%
|
|
| Sysmiss | 17 |