| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.6%
|
| 2 | 3 |
0.9%
|
|
| 3 | 14 |
4.2%
|
|
| 4 | 13 |
3.9%
|
|
| 5 | 35 |
10.5%
|
|
| 6 | 40 |
12%
|
|
| 7 | 34 |
10.2%
|
|
| 8 | 40 |
12%
|
|
| 9 | 18 |
5.4%
|
|
| 10 | Very effective | 19 |
5.7%
|
| 11 | Don't know | 115 |
34.5%
|
| Sysmiss | 21 |