| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.5%
|
|
| 3 | 8 |
4.1%
|
|
| 4 | 7 |
3.6%
|
|
| 5 | 18 |
9.1%
|
|
| 6 | 37 |
18.8%
|
|
| 7 | 44 |
22.3%
|
|
| 8 | 45 |
22.8%
|
|
| 9 | 21 |
10.7%
|
|
| 10 | Very effective | 16 |
8.1%
|
| -99 | 27 | ||
| 11 | Don't know | 317 | |
| Sysmiss | 39 |