| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.9%
|
| 2 | 1 |
0.3%
|
|
| 3 | 9 |
2.7%
|
|
| 4 | 19 |
5.7%
|
|
| 5 | 29 |
8.7%
|
|
| 6 | 51 |
15.2%
|
|
| 7 | 54 |
16.1%
|
|
| 8 | 53 |
15.8%
|
|
| 9 | 35 |
10.4%
|
|
| 10 | Very effective | 45 |
13.4%
|
| 11 | Don't know | 36 |
10.7%
|
| Sysmiss | 19 |