| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 3 |
1%
|
|
| 3 | 10 |
3.3%
|
|
| 4 | 19 |
6.2%
|
|
| 5 | 25 |
8.2%
|
|
| 6 | 40 |
13.1%
|
|
| 7 | 42 |
13.7%
|
|
| 8 | 52 |
17%
|
|
| 9 | 28 |
9.2%
|
|
| 10 | Very effective | 13 |
4.2%
|
| 11 | Don't know | 73 |
23.9%
|
| Sysmiss | 62 |