| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.4%
|
| 2 | 9 |
2%
|
|
| 3 | 7 |
1.5%
|
|
| 4 | 12 |
2.6%
|
|
| 5 | 24 |
5.3%
|
|
| 6 | 33 |
7.2%
|
|
| 7 | 36 |
7.9%
|
|
| 8 | 45 |
9.9%
|
|
| 9 | 31 |
6.8%
|
|
| 10 | Very effective | 88 |
19.3%
|
| 11 | Don't know | 169 |
37.1%
|
| Sysmiss | 111 |