| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 4 |
1.2%
|
|
| 3 | 13 |
3.9%
|
|
| 4 | 10 |
3%
|
|
| 5 | 20 |
6%
|
|
| 6 | 36 |
10.9%
|
|
| 7 | 53 |
16%
|
|
| 8 | 58 |
17.5%
|
|
| 9 | 35 |
10.6%
|
|
| 10 | Very effective | 35 |
10.6%
|
| 11 | Don't know | 66 |
19.9%
|
| Sysmiss | 23 |