| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.3%
|
|
| 3 | 1 |
0.3%
|
|
| 4 | 6 |
2%
|
|
| 5 | 24 |
7.8%
|
|
| 6 | 33 |
10.7%
|
|
| 7 | 67 |
21.8%
|
|
| 8 | 94 |
30.6%
|
|
| 9 | 50 |
16.3%
|
|
| 10 | Very effective | 31 |
10.1%
|
| -99 | 26 | ||
| 11 | Don't know | 209 | |
| Sysmiss | 38 |