| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.1%
|
| 2 | 2 |
1.1%
|
|
| 3 | 4 |
2.1%
|
|
| 4 | 4 |
2.1%
|
|
| 5 | 23 |
12.3%
|
|
| 6 | 17 |
9.1%
|
|
| 7 | 31 |
16.6%
|
|
| 8 | 37 |
19.8%
|
|
| 9 | 28 |
15%
|
|
| 10 | Very effective | 37 |
19.8%
|
| 11 | NA | 0 |
0%
|
| 12 | Don't know | 0 |
0%
|
| Sysmiss | 168 |