| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 6 |
2.7%
|
|
| 3 | 7 |
3.2%
|
|
| 4 | 10 |
4.5%
|
|
| 5 | 25 |
11.3%
|
|
| 6 | 37 |
16.7%
|
|
| 7 | 51 |
23%
|
|
| 8 | 36 |
16.2%
|
|
| 9 | 24 |
10.8%
|
|
| 10 | Very effective | 23 |
10.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 218 |