| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 3 |
1.2%
|
|
| 3 | 8 |
3.3%
|
|
| 4 | 20 |
8.2%
|
|
| 5 | 70 |
28.6%
|
|
| 6 | 46 |
18.8%
|
|
| 7 | 39 |
15.9%
|
|
| 8 | 27 |
11%
|
|
| 9 | 16 |
6.5%
|
|
| 10 | Very effective | 15 |
6.1%
|
| 11 | Don't know | 58 | |
| Sysmiss | 93 |