| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 2 |
0.5%
|
|
| 3 | 5 |
1.3%
|
|
| 4 | 5 |
1.3%
|
|
| 5 | 21 |
5.5%
|
|
| 6 | 37 |
9.7%
|
|
| 7 | 51 |
13.3%
|
|
| 8 | 63 |
16.4%
|
|
| 9 | 40 |
10.4%
|
|
| 10 | Very effective | 25 |
6.5%
|
| 11 | Don't know | 128 |
33.4%
|
| Sysmiss | 46 |