| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 |
0.6%
|
|
| 3 | 4 |
1.2%
|
|
| 4 | 6 |
1.9%
|
|
| 5 | 26 |
8.1%
|
|
| 6 | 38 |
11.8%
|
|
| 7 | 68 |
21.2%
|
|
| 8 | 92 |
28.7%
|
|
| 9 | 41 |
12.8%
|
|
| 10 | Very effective | 44 |
13.7%
|
| -99 | 28 | ||
| 11 | Don't know | 192 | |
| Sysmiss | 39 |