| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.6%
|
| 2 | 4 |
2.1%
|
|
| 3 | 11 |
5.8%
|
|
| 4 | 13 |
6.8%
|
|
| 5 | 31 |
16.3%
|
|
| 6 | 30 |
15.8%
|
|
| 7 | 27 |
14.2%
|
|
| 8 | 27 |
14.2%
|
|
| 9 | 16 |
8.4%
|
|
| 10 | Very effective | 26 |
13.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 165 |