| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.9%
|
| 2 | 12 |
5.9%
|
|
| 3 | 16 |
7.8%
|
|
| 4 | 10 |
4.9%
|
|
| 5 | 24 |
11.8%
|
|
| 6 | 20 |
9.8%
|
|
| 7 | 15 |
7.4%
|
|
| 8 | 16 |
7.8%
|
|
| 9 | 13 |
6.4%
|
|
| 10 | Very effective | 21 |
10.3%
|
| 11 | 51 |
25%
|
|
| Sysmiss | 18 |